Condensed cyclic compound and organic light-emitting device including the same

ABSTRACT

A condensed cyclic compound represented by one of Formulae 1A to 1C, wherein Formulae 1A to 1C are disclosed in the detailed description.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Korean Patent Application No.10-2014-0058395, filed on May 15, 2014, in the Korean IntellectualProperty Office, and all the benefits accruing therefrom under 35 U.S.C.§119, the content of which is incorporated herein in its entirety byreference.

BACKGROUND

1. Field

One or more embodiments relate to condensed cyclic compounds and organiclight-emitting devices including the same.

2. Description of the Related Art

Organic light-emitting devices (OLEDs) are self-emission devices thathave wide viewing angles, high contrast ratios, and short responsetimes. In addition, the OLEDs exhibit excellent brightness, drivingvoltage, and response speed characteristics, and produce full-colorimages.

A typical organic light-emitting device includes an anode, a cathode,and an organic layer that is disposed between the anode and the cathodeand includes an emission layer. A hole transport region may be disposedbetween the anode and the emission layer, and an electron transportregion may be disposed between the emission layer and the cathode. Holesprovided from the anode may move toward the emission layer through thehole transport region, and electrons provided from the cathode may movetoward the emission layer through the electron transport region.Carriers, such as holes and electrons, are recombined in the emissionlayer to produce excitons. These excitons change from an excited stateto a ground state, thereby generating light.

Various types of organic light emitting devices are known. However,there still remains a need in OLEDs having low driving voltage, highefficiency, high brightness, and long lifespan.

SUMMARY

Provided are novel condensed cyclic compounds and organic light-emittingdevices including the same.

Additional aspects will be set forth in part in the description whichfollows and, in part, will be apparent from the description, or may belearned by practice of the presented embodiments.

According to an aspect, a condensed cyclic compound is represented byone of Formulae 1A to 1C:

wherein in the formulae,

Ring A is a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, asubstituted or unsubstituted C₂-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₂-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₂-C₆₀heteroaryl group, a substituted or unsubstituted monovalent non-aromaticcondensed polycyclic group, a substituted or unsubstituted monovalentnon-aromatic condensed heteropolycyclic group, a group represented byFormula 2A, or a group represented by Formula 2B;

Ring B₁ is a C₅-C₂₀ carbocyclic group or a C₂-C₂₀ heterocyclic groupthat does not include a nitrogen atom as a ring-forming atom;

Ring B₂, Ring B₃, Ring C₁, and Ring C₂ are each independently a C₅-C₂₀carbocyclic group, or a C₂-C₂₀ heterocyclic group, provided that atleast one selected from Ring B₂ and Ring B₃ is a C₂-C₂₀ heterocyclicgroup including a nitrogen atom as a ring-forming atom, and at least oneselected from Ring C₁ and Ring C₂ is a C₂-C₂₀ heterocyclic groupincluding a nitrogen atom as a ring-forming atom;

Pc₁ and Pc₂ in Formula 1A and 1B are each independently a grouprepresented by Formulae 2A or a group represented by Formula 2B;

Cz₁, Cz₂, and Cz₃ in Formula 1C are each independently a grouprepresented by Formula 2C, a group represented by Formula 2D, a grouprepresented by Formula 2E, or a group represented by Formula 2F;

c1, c2, c11, c12, c13, p1, p2, p11, p12, and p13 are each independentlyan integer selected from 0 to 3;

when c1 and c2 in Formula 1A and 1B both are 0, Ring A is a grouprepresented by Formula 2A or a group represented by Formula 2B;

when Ring A in Formula 1A and 1B is neither a group represented byFormula 2A nor a group represented by Formula 2B;

c1+c2≠0;

at least one selected from Ring A in Formula 1A, all R₁ in Formula 1A,and all R₂ in Formula 1A is a substituted or unsubstituted C₂-C₁₀heterocycloalkyl group, a substituted or unsubstituted C₂-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₂-C₆₀heteroaryl group, or a substituted or unsubstituted monovalentnon-aromatic condensed hetero-polycyclic group, each including at leastone Moiety 1 as a ring-forming moiety;

the sum of c11, c12, and c13 in Formula 1C is not 0;

when each of Cz₁, Cz₂, and Cz₃ in Formula 1C is independently a grouprepresented by Formula 2C or a group represented by Formula 2D, at leastone selected from all R₁₁ in Formula 1C, all R₁₂ in Formula 1C, and allR₁₃ in Formula 1C is a substituted or unsubstituted C₂-C₁₀heterocycloalkyl group, a substituted or unsubstituted C₂-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₂-C₆₀heteroaryl group, or a substituted or unsubstituted monovalentnon-aromatic condensed hetero-polycyclic group, each including at leastone Moiety 1 as a ring-forming moiety;

L₁ to L₃, L₁₁ to L₁₃, L₂₁ to L₂₄, and L₃₁ to L₃₃ are each independentlyselected from a substituted or unsubstituted C₁-C₆₀ alkylene group, asubstituted or unsubstituted C₂-C₆₀ alkenylene group, a substituted orunsubstituted C₃-C₁₀ cycloalkylene group, a substituted or unsubstitutedC₂-C₁₀ heterocycloalkylene group, a substituted or unsubstituted C₃-C₁₀cycloalkenylene group, a substituted or unsubstituted C₂-C₁₀heterocycloalkenylene group, a substituted or unsubstituted C₆-C₆₀arylene group, a substituted or unsubstituted C₂-C₆₀ heteroarylenegroup, a substituted or unsubstituted divalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted divalentnon-aromatic condensed hetero-polycyclic group;

a1 to a3, a11 to a13, a21 to a24, and a31 to a33 are each independentlyan integer selected from 0 to 6;

R₁, R₂, R₁₁ to R₁₃, R₂₁ to R₂₃, and R₃₁ to R₃₃ are each independentlyselected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted orunsubstituted C₂-C₆₀ alkenyl group, a substituted or unsubstitutedC₂-C₆₀ alkynyl group, a substituted or unsubstituted C₁-C₆₀ alkoxygroup, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, asubstituted or unsubstituted C₂-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₂-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, asubstituted or unsubstituted C₂-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedhetero-polycyclic group, —N(Q₁)(Q₂), —Si(Q₃)(Q₄)(Q₅), and —B(Q₆)(Q₇);

b1, b2, b11 to b13, b21 to b23, and b31 to b33 are each independently aninteger selected from 0 to 4;

at least one of substituents of the substituted C₁-C₆₀ alkylene group,substituted C₂-C₆₀ alkenylene group, substituted C₃-C₁₀ cycloalkylenegroup, substituted C₂-C₁₀ heterocycloalkylene group, substituted C₃-C₁₀cycloalkenylene group, substituted C₂-C₁₀ heterocycloalkenylene group,substituted C₆-C₆₀ arylene group, substituted C₂-C₆₀ heteroarylenegroup, substituted divalent non-aromatic condensed polycyclic group,substituted divalent non-aromatic condensed hetero-polycyclic group,substituted C₁-C₆₀ alkyl group, substituted C₂-C₆₀ alkenyl group,substituted C₂-C₆₀ alkynyl group, substituted C₁-C₆₀ alkoxy group,substituted C₃-C₁₀ cycloalkyl group, substituted C₂-C₁₀ heterocycloalkylgroup, substituted C₃-C₁₀ cycloalkenyl group, substituted C₂-C₁₀heterocycloalkenyl group, substituted C₆-C₆₀ aryl group, substitutedC₆-C₆₀ aryloxy group, substituted C₆-C₆₀ arylthio group, substitutedC₂-C₆₀ heteroaryl group, a substituted monovalent non-aromatic condensedpolycyclic group, and a substituted monovalent non-aromatic condensedhetero-polycyclic group is selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀ cycloalkylgroup, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, aC₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxygroup, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed hetero-polycyclic group, —N(Q₁₁)(Q₁₂), —Si(Q₁₃)(Q₁₄)(Q₁₅), and—B(Q₁₆)(Q₁₇);

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —N(Q₂₁)(Q₂₂), —Si(Q₂₃)(Q₂₄)(Q₂₅), and—B(Q₂₆)(Q₂₇); and

—N(Q₃₁)(Q₃₂), —Si(Q₃₃)(Q₃₄)(Q₃₅), and —B(Q₃₆)(Q₃₇);

wherein Q₁ to Q₇, Q₁₁ to Q₁₇, Q₂₁ to Q₂₇, and Q₃₁ to Q₃₇ may be eachindependently selected from a hydrogen, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic hetero-condensed polycyclic group.

**═N—***  Moiety 1

in Moiety 1, ** and *** each indicates a binding site to a ring-formingatom included in a ring including Moiety 1.

According to another aspect, an organic light-emitting device includes:

a first electrode;

a second electrode; and

an organic layer disposed between the first electrode and the secondelectrode,

wherein the organic layer includes an emission layer, and furtherincludes at least one condensed cyclic compound represented by Formula1.

BRIEF DESCRIPTION OF THE DRAWINGS

These and/or other aspects will become apparent and more readilyappreciated from the following description of the embodiments, taken inconjunction with FIG. 1 which is a schematic view of an organiclight-emitting device according to an embodiment.

DETAILED DESCRIPTION

Reference will now be made in detail to embodiments, examples of whichare illustrated in the accompanying drawings, wherein like referencenumerals refer to like elements throughout. In this regard, the presentembodiments may have different forms and should not be construed asbeing limited to the descriptions set forth herein. Accordingly, theembodiments are merely described below, by referring to the figures, toexplain aspects. As used herein, the term “and/or” includes any and allcombinations of one or more of the associated listed items. The term“or” means “and/or.” Expressions such as “at least one of,” whenpreceding a list of elements, modify the entire list of elements and donot modify the individual elements of the list.

It will be understood that when an element is referred to as being “on”another element, it can be directly in contact with the other element orintervening elements may be present therebetween. In contrast, when anelement is referred to as being “directly on” another element, there areno intervening elements present.

It will be understood that, although the terms first, second, third etc.may be used herein to describe various elements, components, regions,layers, and/or sections, these elements, components, regions, layers,and/or sections should not be limited by these terms. These terms areonly used to distinguish one element, component, region, layer, orsection from another element, component, region, layer, or section.Thus, a first element, component, region, layer, or section discussedbelow could be termed a second element, component, region, layer, orsection without departing from the teachings of the present embodiments.

The terminology used herein is for the purpose of describing particularembodiments only and is not intended to be limiting. As used herein, thesingular forms “a,” “an,” and “the” are intended to include the pluralforms as well, unless the context clearly indicates otherwise.

It will be further understood that the terms “comprises” and/or“comprising,” or “includes” and/or “including” when used in thisspecification, specify the presence of stated features, regions,integers, steps, operations, elements, and/or components, but do notpreclude the presence or addition of one or more other features,regions, integers, steps, operations, elements, components, and/orgroups thereof.

Spatially relative terms, such as “beneath,” “below,” “lower,” “above,”“upper” and the like, may be used herein for ease of description todescribe one element or feature's relationship to another element(s) orfeature(s) as illustrated in the figures. It will be understood that thespatially relative terms are intended to encompass differentorientations of the device in use or operation in addition to theorientation depicted in the figures. For example, if the device in thefigures is turned over, elements described as “below” or “beneath” otherelements or features would then be oriented “above” the other elementsor features. Thus, the exemplary term “below” can encompass both anorientation of above and below. The device may be otherwise oriented(rotated 90 degrees or at other orientations) and the spatially relativedescriptors used herein interpreted accordingly.

“About” or “approximately” as used herein is inclusive of the statedvalue and means within an acceptable range of deviation for theparticular value as determined by one of ordinary skill in the art,considering the measurement in question and the error associated withmeasurement of the particular quantity (i.e., the limitations of themeasurement system). For example, “about” can mean within one or morestandard deviations, or within ±30%, 20%, 10%, 5% of the stated value.

Unless otherwise defined, all terms (including technical and scientificterms) used herein have the same meaning as commonly understood by oneof ordinary skill in the art to which this invention belongs. It will befurther understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art and thepresent disclosure, and will not be interpreted in an idealized oroverly formal sense unless expressly so defined herein.

Exemplary embodiments are described herein with reference to crosssection illustrations that are schematic illustrations of idealizedembodiments. As such, variations from the shapes of the illustrations asa result, for example, of manufacturing techniques and/or tolerances,are to be expected. Thus, embodiments described herein should not beconstrued as limited to the particular shapes of regions as illustratedherein but are to include deviations in shapes that result, for example,from manufacturing. For example, a region illustrated or described asflat may, typically, have rough and/or nonlinear features. Moreover,sharp angles that are illustrated may be rounded. Thus, the regionsillustrated in the figures are schematic in nature and their shapes arenot intended to illustrate the precise shape of a region and are notintended to limit the scope of the present claims.

A condensed cyclic compound according to an embodiment is represented byone of Formulae 1A to 1C:

The relationships between the groups represented by Formulae 2A to 2Fand the condensed cyclic compound represented by one of Formulae 1A to1C will be described below in detail.

Ring A in Formula 1A may be a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₂-C₁₀ heterocycloalkylgroup, a substituted or unsubstituted C₃-C₁₀ cycloalkenyl group, asubstituted or unsubstituted C₂-C₁₀ heterocycloalkenyl group, asubstituted or unsubstituted C₆-C₆₀ aryl group, a substituted orunsubstituted C₂-C₆₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group,a group represented by Formula 2A, or a group represented by Formula 2B.

According to an embodiment, Ring A in Formula 1A may be selected from

a phenyl group, a naphthyl group, a phenalenyl group, a phenanthrenylgroup, an anthracenyl group, a triphenylenyl group, a pyrenyl group, achrysenyl group, a pyrrolyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisooxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinylgroup, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group,phenanthridinyl, phenanthrolinyl, phenazinyl, a benzoimidazolyl group,an isobenzothiazolyl group, a benzooxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, an imidazopyridinyl group, an imidazopyrimidinyl group,a benzofuropyrazinyl group, a benzofuropyrimidinyl group, abenzofuropyridinyl group, a benzothienopyrazinyl group, abenzothienopyrimidinyl group, a benzothienopyridinyl group, a grouprepresented by Formula 2A, and a group represented by Formula 2B; and

a phenyl group, a naphthyl group, a phenalenyl group, a phenanthrenylgroup, an anthracenyl group, a triphenylenyl group, a pyrenyl group, achrysenyl group, a pyrrolyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisooxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinylgroup, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group,phenanthridinyl, phenanthrolinyl, phenazinyl, a benzoimidazolyl group,an isobenzothiazolyl group, a benzooxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, an imidazopyridinyl group, an imidazopyrimidinyl group,a benzofuropyrazinyl group, a benzofuropyrimidinyl group, abenzofuropyridinyl group, a benzothienopyrazinyl group, abenzothienopyrimidinyl group, and a benzothienopyridinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a phenyl group substituted with a C₁-C₂₀ alkyl group, a naphthylgroup, a phenalenyl group, a phenanthrenyl group, an anthracenyl group,a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, abiphenyl group, and —Si(Q₃₃)(Q₃₄)(Q₃₅),

wherein Q₃₃ to Q₃₅ may be each independently selected from a hydrogen, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, an anthracenyl group, a triphenylenyl group, a pyrenyl group, aphenanthrenyl group, a fluorenyl group, a chrysenyl group, a carbazolylgroup, a benzocarbazolyl group, a dibenzocarbazolyl group, adibenzofuranyl group, a dibenzothiophenyl group, a pyridinyl group, apyrimidinyl group, a triazinyl group, a quinolinyl group, anisoquinolinyl group, a quinazolinyl group, and a quinoxalinyl group.

In some embodiments, Ring A in Formula 1A may be represented by one ofFormulae 4-1 to 4-51, Formulae 6-1 to 6-5 below, a group representedFormula 2A, and a group represented by Formula 2B, but a formularepresenting Ring A is not limited thereto:

In Formulae 4-1 to 4-51 and 6-1 to 6-5,

Y₃₁ is O, S, C(Z₃₃)(Z₃₄), N(Z₃₅), or Si(Z₃₆)(Z₃₇);

Z₃₁ to Z₃₇ may be each independently selected from a hydrogen, adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, aC₁-C₂₀ alkoxy group, a phenyl group substituted with a C₁-C₂₀ alkylgroup, a phenyl group, a naphthyl group, an anthracenyl group, atriphenylenyl group, a pyrenyl group, a phenanthrenyl group, a fluorenylgroup, a chrysenyl group, a carbazolyl group, a benzocarbazolyl group, adibenzocarbazolyl group, a dibenzofuranyl group, a dibenzothiophenylgroup, a pyridinyl group, a pyrimidinyl group, a triazinyl group, aquinolinyl group, an isoquinolinyl group, a quinazolinyl group, aquinoxalinyl group, a biphenyl group, and —Si(Q₃₃)(Q₃₄)(Q₃₅); wherein

Q₃₃ to Q₃₅ are each independently selected from a hydrogen, a C₁-C₂₀alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, ananthracenyl group, a triphenylenyl group, a pyrenyl group, aphenanthrenyl group, a fluorenyl group, a chrysenyl group, a carbazolylgroup, a benzocarbazolyl group, a dibenzocarbazolyl group, adibenzofuranyl group, a dibenzothiophenyl group, a pyridinyl group, apyrimidinyl group, a triazinyl group, a quinolinyl group, anisoquinolinyl group, a quinazolinyl group, and a quinoxalinyl group;

e1 is an integer of 1 to 5;

e2 is an integer of 1 to 7;

e3 is an integer of 1 to 3;

e4 is an integer of 1 to 4;

e5 is an integer of 1 or 2;

e6 is an integer of 1 to 6; and

* indicates a binding site to a neighboring atom.

Ring B₁ in Formula 1A is a C₅-C₂₀ carbocyclic group or a C₂-C₂₀heterocyclic group that does not includes a nitrogen atom as aring-forming atom.

For example, Ring B₁ in Formula 1A may be a benzene, a naphthalene, ananthracene, a phenanthrene, a benzofuran, or a benzothiophene.

According to an embodiment, Ring B₁ in Formula 1A may be a benzene, anaphthalene, an anthracene, a phenanthrene, or a benzofuran.

Ring B₂, Ring B₃, Ring C₁, and Ring C₂ in Formulae 1B and 1C are eachindependently a C₅-C₂₀ carbocyclic group or a C₂-C₂₀ heterocyclic group,provided that at least one selected from Ring B₂ and Ring B₃ is a C₂-C₂₀heterocyclic group including a nitrogen atom as a ring-forming atom, andat least one selected from Ring C₁ and Ring C₂ is a C₂-C₂₀ heterocyclicgroup including a nitrogen atom as a ring-forming atom.

In some embodiments, Ring B₂, Ring B₃, Ring C₁, and Ring C₂ may be eachindependently a benzene, a naphthalene, an anthracene, a phenanthrene, abenzofuran, a benzothiophene, a pyridine, a pyrimidine, a pyrazine, abenzofuropyrazine, a benzofuropyrimidine, benzofuropyridine, abenzothienopyrazine, a benzothienopyrimidine, or a benzothienopyridine;

at least one selected from Ring B₂ and Ring B₃ is a pyridine, apyrimidine, a pyrazine, a benzofuropyrazine, a benzofuropyrimidine, abenzofuropyridine, a benzothienopyrazine, a benzothienopyrimidine, or abenzothienopyridine, and

at least one selected from Ring C₁ and Ring C₂ is a pyridine, apyrimidine, a pyrazine, a benzofuropyrazine, a benzofuropyrimidine, abenzofuropyridine, a benzothienopyrazine, a benzothienopyrimidine, or abenzothienopyridine.

In some embodiments, Ring B₂, Ring B₃, Ring C₁, and Ring C₂ may be eachindependently a benzene, a naphthalene, a pyridine, a pyrimidine, or apyrazine;

at least one of Ring B₂ and Ring B₃ may be a pyridine, a pyrimidine, ora pyrazine; and

at least one of Ring C₁ and Ring C₂ may be a pyridine, a pyrimidine, ora pyrazine.

Pc₁ and Pc₂ in Formula 1A and 1B are each independently a grouprepresented by Formulae 2A or a group represented by Formula 2B.

Each of Cz₁, Cz₂, and Cz₃ in Formula 1C is independently a grouprepresented by Formula 2C, a group represented by Formula 2D, a grouprepresented by Formula 2E, or a group represented by Formula 2F.

c1, c2, c11, c12, c13, p1, p2, p11, p12, and p13 in Formulae 1A to 1Care each independently an integer selected from 0 to 3.

When each of c1 and c2 in Formulae 1A and 1B is 0, Ring A is a grouprepresented by Formula 2A or a group represented by Formula 2B, and whenRing A in Formulae 1A and 1B is neither a group represented by Formula2A nor a group represented by Formula 2B, c1+c2≠0.

That is, Formulae 1A and 1B necessarily include one selected from thegroup represented by Formula 2A and the group represented by Formula 2B.

At least one selected from Ring A in Formula 1A, all R₁ in Formula 1A,and all R₂ in Formula 1A is an electron transport moiety.

The electron transport moiety may be a substituted or unsubstitutedC₂-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₂-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₂-C₆₀heteroaryl group, or a substituted or unsubstituted monovalentnon-aromatic condensed hetero-polycyclic group, each including Moiety 1below as a ring-forming moiety. Herein, a carbazole-based group thatdoes not include Moiety 1 is not an electron transport moiety, due tothe absence of Moiety 1.

**═N—***  Moiety 1

in Moiety 1, ** and *** each indicates a binding site to a ring-formingatom in a ring including Moiety 1.

Examples of the electron transport moiety are groups represented byFormulae 4-1 to 4-51, but are not limited thereto.

The sum of c11, c12, and c13 in Formula 1C is not 0.

That is, Formula 1C necessarily includes at least one of groupsrepresented by Formulae 2C to 2F.

When Cz₁, Cz₂, and Cz₃ in Formula 1C is a group represented by Formula2C or a group represented by Formula 2D, at least one selected from R₁₁in Formula 1C, R₁₂ in Formula 1C, and R₁₃ in Formula 1C is an electrontransport moiety. Herein, the electron transport moiety has beendescribed above and will not be repeated.

According to an embodiment, in Formulae 1A and 1B,

c1=0, c2=0, and Ring A is a group represented by Formula 2A or a grouprepresented by Formula 2B;

c1=1 and c2=0; or

c1=1 and c2=1.

In some embodiments, in Formula 1C,

c11=1, c12=0, and c13=0;

c11=0, c12=0, and c13=1;

c11=1, c12=1, and c13=0; or

c11=1, c12=0, and c13=1.

L₁ to L₃, L₁₁ to L₁₃, L₂₁ to L₂₄, and L₃₁ to L₃₃ in Formulae 1A to 1Cand 2A to 2F may be each independently selected from a substituted orunsubstituted C₁-C₆₀ alkylene group, a substituted or unsubstitutedC₂-C₆₀ alkenylene group, a substituted or unsubstituted C₃-C₁₀cycloalkylene group, a substituted or unsubstituted C₂-C₁₀heterocycloalkylene group, a substituted or unsubstituted C₃-C₁₀cycloalkenylene group, a substituted or unsubstituted C₂-C₁₀heterocycloalkenylene group, a substituted or unsubstituted C₆-C₆₀arylene group, a substituted or unsubstituted C₂-C₆₀ heteroarylenegroup, a substituted or unsubstituted divalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted divalentnon-aromatic condensed hetero-polycyclic group.

For example, L₁ to L₃, L₁₁ to L₁₃, L₂₁ to L₂₄ and L₃₁ to L₃₃ in Formulae1A to 1C and 2A to 2F may be each independently selected from

a phenylene group, a pentalenylene group, an indenylene group, anaphthylene group, an azulenylene group, a heptalenylene group, anindacenylene group, an acenaphthylene group, a fluorenylene group, aspiro-fluorenylene group, a phenalenylene group, a phenanthrenylenegroup, an anthracenylene group, a fluoranthrenylene group, atriphenylenylene group, a pyrenylene group, a chrysenylene group, anaphthacenylene group, a picenylene group, a perylenylene group, apentaphenylene group, a hexacenylene group, a pyrrolylene group, animidazolylene group, a pyrazolylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a pyridazinylene group, anisoindolylene group, an indolylene group, an indazolylene group, apurinylene group, a quinolinylene group, an isoquinolinylene group, abenzoquinolinylene group, a phthalazinylene group, a naphthyridinylenegroup, a quinoxalinylene group, a quinazolinylene group, a cinnolinylenegroup, a carbazolylene group, a phenanthridinylene group, anacridinylene group, a phenanthrolinylene group, a phenazinylene group, abenzoxazolylene group, a benzoimidazolylene group, a furanylene group, abenzofuranylene group, a thiophenylene group, a benzothiophenylenegroup, a thiazolylene group, an isothiazolylene group, abenzothiazolylene group, an isoxazolylene group, an oxazolylene group, atriazolylene group, a tetrazolylene group, an oxadiazolylene group, atriazinylene group, a dibenzofuranylene group, a dibenzothiophenylenegroup, a benzocarbazolylene group, a dibenzocarbazolylene group, animidazopyrimidinylene group, and an imidazopyridinylene group; and

a phenylene group, a pentalenylene group, an indenylene group,naphthylene group, an azulenylene group, a heptalenylene group, anindacenylene group, an acenaphthylene group, a fluorenylene group, aspiro-fluorenylene group, a phenalenylene group, a phenanthrenylenegroup, an anthracenylene group, a fluoranthrenylene group, atriphenylenylene group, a pyrenylene group, a chrysenylene group, anaphthacenylene group, a picenylene group, a perylenylene group, apentaphenylene group, a hexacenylene group, a pyrrolylene group, animidazolylene group, a pyrazolylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a pyridazinylene group, anisoindolylene group, an indolylene group, an indazolylene group, apurinylene group, a quinolinylene group, an isoquinolinylene group, abenzoquinolinylene group, a phthalazinylene group, a naphthyridinylenegroup, a quinoxalinylene group, a quinazolinylene group, a cinnolinylenegroup, a carbazolylene group, a phenanthridinylene group, anacridinylene group, a phenanthrolinylene group, a phenazinylene group, abenzooxazolylene group, a benzoimidazolylene group, a furanylene group,a benzofuranylene group, a thiophenylene group, a benzothiophenylenegroup, a thiazolylene group, an isothiazolylene group, abenzothiazolylene group, an isoxazolylene group, an oxazolylene group, atriazolylene group, a tetrazolylene group, an oxadiazolylene group, atriazinylene group, a dibenzofuranylene group, a dibenzothiophenylenegroup, a benzocarbazolylene group, a dibenzocarbazolylene group animidazopyrimidinylene group, and an imidazopyridinylene group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a C₆-C₂₀aryl group, a C₂-C₂₀ heteroaryl group, a monovalent non-aromaticcondensed polycyclic group, a monovalent non-aromatic condensedhetero-polycyclic group, and —Si(Q₃₃)(Q₃₄)(Q₃₅);

wherein Q₃₃ to Q₃₅ are each independently selected from a hydrogen, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, an anthracenyl group, a pyrenyl group, a phenanthrenyl group, afluorenyl group, a carbazolyl group, a benzocarbazolyl group, adibenzocarbazolyl group, a pyridinyl group, a pyrimidinyl group, apyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinylgroup, an isoquinolinyl group a phthalazinyl group, a quinoxalinylgroup, a cinnolinyl group, and a quinazolinyl group.

According to an embodiment, L₁ to L₃, L₁₁ to L₁₃, L₂₁ to L₂₄ and L₃₁ toL₃₃ in Formulae 1A to 1C and 2A to 2F may be each independently oneselected from Formulae 2-1 to 2-37:

wherein in Formulae 2-1 to 2-37,

Y₁ may be O, S, S(═O), S(═O)₂, C(Z₃)(Z₄), N(Z₅), or Si(Z₆)(Z₇);

Z₁ to Z₇ are each independently selected from a hydrogen, a deuterium,—F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, anamino group, an amidino group, a hydrazine group, a hydrazone group, acarboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, aphosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxygroup, a phenyl group, a naphthyl group, an anthracenyl group, atriphenylenyl group, a pyrenyl group, a phenanthrenyl group, a fluorenylgroup, a chrysenyl group, a carbazolyl group, a benzocarbazolyl group, adibenzocarbazolyl group, a dibenzofuranyl group, a dibenzothiophenylgroup, a pyridinyl group, a pyrimidinyl group, a triazinyl group, aquinolinyl group, an isoquinolinyl group, a quinazolinyl group, aquinoxalinyl group, a biphenyl group, and —Si(Q₃₃)(Q₃₄)(Q₄₅), wherein

Q₃₃ to Q₄₅ are each independently selected from a hydrogen, a C₁-C₂₀alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, ananthracenyl group, a pyrenyl group, a phenanthrenyl group, a fluorenylgroup, a carbazolyl group, a benzocarbazolyl group, a dibenzocarbazolylgroup, a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, apyridazinyl group, a triazinyl group, a quinolinyl group, anisoquinolinyl group a phthalazinyl group, a quinoxalinyl group, acinnolinyl group, and a quinazolinyl group;

d1 is an integer of 1 to 4;

d2 is an integer of 1 to 3;

d3 is an integer of 1 to 6;

d4 is an integer of 1 to 8;

d5 is an integer of 1 or 2;

d6 is an integer of 1 to 5; and

* indicates a binding site to a neighboring atom.

In some embodiments, L₁ to L₃, L₁₁ to L₁₃, L₂₁ to L₂₄ and L₃₁ to L₃₃ inFormulae 1A to 1C and 2A to 2F may be each independently selected from

a phenylene group, a naphthylene group, a phenanthrenylene group, ananthracenylene group, a triphenylenylene group, and a carbazolylenegroup; and

a phenylene group, a naphthylene group, a phenanthrenylene group, ananthracenylene group, a triphenylenylene group, and a carbazolylenegroup each substituted with at least one selected from a deuterium, —F,—Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, acarboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, aphosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxygroup, a phenyl group, a naphthyl group, an anthracenyl group, atriphenylenyl group, a phenanthrenyl group, and a biphenyl group, butthey are not limited thereto.

In some embodiments, L₁ to L₃, L₁₁ to L₁₃, L₂₁ to L₂₄ and L₃₁ to L₃₃ inFormulae 1A to 1C and 2A to 2F may be each independently one of Formulae3-1 to 3-33, but are not limited thereto:

wherein * and *′ in Formulae 3-1 to 3-33 each independently indicates abinding site to a neighboring atom.

a1 in Formulae 1A to 1C indicates the number of L₁, and may be 0, 1, 2,3, 4 or 6, for example, 0, 1 or 2, or for example, 0 or 1. When a1 is 0,L₁ is a single bond. When a1 is 2 or more, groups L₁ may be identical ordifferent. a2 to a3, a11 to a13, a21 to a24 and a31 to a33 may beunderstood by referring to the description presented in connection witha1 and structures of Formulae 1A to 1C and 2A to 2F.

According to an embodiment, a1 to a3, a11 to a13, a21 to a24 and a31 toa33 in Formula 1 may be each independently 0, 1, or 2, for example, 0 or1, but they are not limited thereto.

R₁, R₂, R₁₁ to R₁₃, R₂₁ to R₂₃, and R₃₁ to R₃₃ in Formulae 1A to 1C and2A to 2F may be each independently selected from a hydrogen, adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a substituted orunsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₂-C₆₀alkenyl group, a substituted or unsubstituted C₂-C₆₀ alkynyl group, asubstituted or unsubstituted C₁-C₆₀ alkoxy group, a substituted orunsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstitutedC₂-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₂-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₆-C₆₀ aryloxy group, asubstituted or unsubstituted C₆-C₆₀ arylthio group, a substituted orunsubstituted C₂-C₆₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, a substituted orunsubstituted monovalent non-aromatic condensed hetero-polycyclic group,a group represented by Formula 2A, a group represented by Formula 2B,—N(Q₁)(Q₂), —Si(Q₃)(Q₄)(Q₅), and —B(Q₆)(Q₇).

For example, R₁, R₂, R₁₁ to R₁₃, R₂₁ to R₂₃, and R₃₁ to R₃₃ may be eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, and a phosphoric acid or a saltthereof;

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group,an azulenyl group, a heptalenyl group, an indacenyl group, anacenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, aphenanthrenyl group, an anthracenyl group, a fluoranthenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenylgroup, a picenyl group, a perylenyl group, a pentaphenyl group, ahexacenyl group, a pentacenyl group, a rubicenyl group, a coronenylgroup, an ovalenyl group, a pyrrolyl group, a thiophenyl group, afuranyl group, an imidazolyl group, a pyrazolyl group, a thiazolylgroup, an isothiazolyl group, an oxazolyl group, an isooxazolyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, an isoindolyl group, an indolyl group, an indazolyl group, apurinyl group, a quinolinyl group, an isoquinolinyl group, abenzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthridinyl group, an acridinyl group, aphenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, an imidazopyridinyl group, and animidazopyrimidinyl group;

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group,an azulenyl group, a heptalenyl group, an indacenyl group, anacenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, aphenanthrenyl group, an anthracenyl group, a fluoranthenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenylgroup, a picenyl group, a perylenyl group, a pentaphenyl group, ahexacenyl group, a pentacenyl group, a rubicenyl group, a coronenylgroup, an ovalenyl group, a pyrrolyl group, a thiophenyl group, afuranyl group, an imidazolyl group, a pyrazolyl group, a thiazolylgroup, an isothiazolyl group, an oxazolyl group, an isooxazolyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, an isoindolyl group, an indolyl group, an indazolyl group, apurinyl group, a quinolinyl group, an isoquinolinyl group, abenzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, phenanthridinyl, acridinyl, phenanthrolinyl,phenazinyl, a benzoimidazolyl group, a benzofuranyl group, abenzothiophenyl group, an isobenzothiazolyl group, a benzooxazolylgroup, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group,an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, adibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolylgroup, an imidazopyridinyl group, and an imidazopyrimidinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a phenyl group substituted with a C₁-C₂₀ alkyl group, apentalenyl group, an indenyl group, a naphthyl group, an azulenyl group,a heptalenyl group, an indacenyl group, an acenaphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isooxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzooxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinylgroup, an imidazopyrimidinyl group, a biphenyl group, and—Si(Q₃₃)(Q₃₄)(Q₃₅); and

—Si(Q₃)(Q₄)(Q₅);

wherein Q₃ to Q₅ and Q₃₃ to Q₃₅ are each independently selected from ahydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, anaphthyl group, an anthracenyl group, a pyrenyl group, a phenanthrenylgroup, a fluorenyl group, a chrysenyl group, a carbazolyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a dibenzofuranylgroup, a dibenzothiophenyl group, a pyridinyl group, a pyrimidinylgroup, a triazinyl group, a quinolinyl group, an isoquinolinyl group, aquinazolinyl group, and a quinoxalinyl group.

In some embodiments, R₁, R₂, R₁₁ to R₁₃, R₂₁ to R₂₃, and R₃₁ to R₃₃ maybe each independently selected from

a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, and a phosphoric acid or a saltthereof;

one selected from Formulae 4-1 to 4-51, 5-1 to 5-6, and 6-1 to 6-5; and

—Si(Q₃)(Q₄)(Q₅),

wherein Q₃ to Q₅ may be each independently selected from a hydrogen, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, an anthracenyl group, a pyrenyl group, a phenanthrenyl group, afluorenyl group, a chrysenyl group, a carbazolyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a dibenzofuranylgroup, a dibenzothiophenyl group, a pyridinyl group, a pyrimidinylgroup, a triazinyl group, a quinolinyl group, an isoquinolinyl group, aquinazolinyl group, and a quinoxalinyl group, but they are not limitedthereto.

wherein in Formulae 4-1 to 4-51, 5-1 to 5-6, and 6-1 to 6-5,

Y₃₁ is O, S, C(Z₃₃)(Z₃₄), N(Z₃₅), or Si(Z₃₆)(Z₃₇);

Z₃₁ to Z₃₇ may be each independently selected from a hydrogen, adeuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₂₀ alkyl group, aC₁-C₂₀ alkoxy group, a phenyl group substituted with a C₁-C₂₀ alkylgroup, a phenyl group, a naphthyl group, an anthracenyl group, atriphenylenyl group, a pyrenyl group, a phenanthrenyl group, a fluorenylgroup, a chrysenyl group, a carbazolyl group, a benzocarbazolyl group, adibenzocarbazolyl group, a dibenzofuranyl group, a dibenzothiophenylgroup, a pyridinyl group, a pyrimidinyl group, a triazinyl group, aquinolinyl group, an isoquinolinyl group, a quinazolinyl group, aquinoxalinyl group, a biphenyl group, and —Si(Q₃₃)(Q₃₄)(Q₃₅); wherein

Q₃₃ to Q₃₅ are each independently selected from a hydrogen, a C₁-C₂₀alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, ananthracenyl group, a triphenylenyl group, a pyrenyl group, aphenanthrenyl group, a fluorenyl group, a chrysenyl group, a carbazolylgroup, a benzocarbazolyl group, a dibenzocarbazolyl group, adibenzofuranyl group, a dibenzothiophenyl group, a pyridinyl group, apyrimidinyl group, a triazinyl group, a quinolinyl group, anisoquinolinyl group, a quinazolinyl group, and a quinoxalinyl group;

e1 is an integer of 1 to 5;

e2 is an integer of 1 to 7;

e3 is an integer of 1 to 3;

e4 is an integer of 1 to 4;

e5 is an integer of 1 or 2;

e6 is an integer of 1 to 6; and

* indicates a binding site to a neighboring atom.

b1, b2, b11 to b13, b21 to b23, and b31 to b33 in the formulae above maybe each independently an integer selected from 0 to 4. For example, b1,b2, b11 to b13, b21 to b23 and b31 to b33 may be each independently 0 or1, but they are not limited thereto.

Formula 2A may be represented by one of Formulae 2A(1) to 2A(5) below,Formula 2B may be represented by one of Formulae 2B(1) and 2B(2) below,Formula 2D may be represented by one of Formulae 2D(1) to 2D(5) below,and Formula 2F may be represented by one of Formulae 2F(1) and 2F(2)below:

L₂₁ to L₂₄, a21 to a24, R₂₁ to R₂₃, b21 to b23, L₃₁ to L₃₃, a31 to a33,R₃₁ to R₃₃, b31 to b33, c21 to c23, c31, and c32 in Formulae 2A (1) to2A (5), 2B(1), 2B(2), 2E(1) to 2E(5), 2F(1), and 2F(2) are as describedabove.

For example, a24 in Formulae 2A(1) to 2A(5), 2B(1), and 2B(2) is 0, 1,or 2, and L₂₄ is selected from Formulae 2-1 to 2-37, and c11, c12, andc13 may each be a hydrogen, but they are not limited thereto.

The condensed cyclic compound represented by Formula 1 may berepresented by one of Formulae 1A(1) to 1A(8) below:

In Formulae 1A(1) and 1A(8),

Ring A is a substituted or unsubstituted C₂-C₁₀ heterocycloalkyl group,a substituted or unsubstituted C₂-C₁₀ heterocycloalkenyl group, asubstituted or unsubstituted C₂-C₆₀ heteroaryl group, or a substitutedor unsubstituted monovalent non-aromatic condensed hetero-polycyclicgroup, each including Moiety 1 as a ring-forming moiety, (for example, agroup represented by one of Formulae 4-1 to 4-55),

Pc₂, Pc₂, L₃, a3, R₁, R₂, p1, and p2 are as described above, and

R₃ to R₄ are as described above.

In some embodiments, the condensed cyclic compound represented byFormula 1 may be represented by one of Formulae 1B(1) to 1B(10) below:

Ring A, Pc₁, Pct, L₃, a3, R₁, R₂, p1, and p2 in Formulae 1B(1) to 1B(10)are as described above.

In some embodiments, the condensed cyclic compound may be represented byFormulae 1C(1) or 1C(2) below:

Cz₁, Cz₂, Cz₃, R₁₁, R₁₂, R₁₃, p11, p12, and p13 in Formulae 1C(1) and1C(2) are as described above.

In some embodiments, the condensed cyclic compound may be represented byFormulae 1C(3) below:

wherein in Formula 1C(3),

Cz₃, L₁₁, and a11 are as described above; R₁₁ may be a substituted orunsubstituted C₂-C₁₀ heterocycloalkyl group, a substituted orunsubstituted C₂-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₂-C₆₀ heteroaryl group, or a substituted or unsubstitutedmonovalent non-aromatic condensed hetero-polycyclic group, eachincluding Moiety 1 as a ring-forming moiety, (for example, a grouprepresented by one of Formulae 4-1 to 4-55); and b11 is 1 or 2.

In some embodiments, the condensed cyclic compound may be represented byFormulae 1C(4) or 1C(5) below:

wherein in Formulae 1C (4) and 1C (5), Cz₁ and Cz₃ are each a grouprepresented by Formula 2E or a group represented by Formula 2F.

The condensed cyclic compound may be one of Compounds 1 to 76 below, butis not limited thereto:

Formulae 1A and 1B necessarily include at least one group represented byone of Formulae 2A and 2B, and Formula 1C has a core that issubstantially similar to Formulae 2A and 2B. Accordingly, excellentthermal stability may be obtained.

In some embodiments, Formula 1A necessarily includes the electrontransport moiety (for example, see Formulae 4-1 to 4-55) used herein, atleast one selected from Ring B₁ and Ring B₂ in Formula 1B necessarilyincludes at least one nitrogen as a ring-forming atom, and Formula 1Cnecessarily includes either the electron transport moiety used herein inits molecular structure or a group represented by at least one ofFormulae 2E and 2F. Accordingly, the condensed cyclic compoundrepresented by one of Formulae 1A to 1C may have excellent bipolarcharacteristics and high T₁ energy levels, and due to thesecharacteristics, the condensed cyclic compound is appropriate for use asa material for forming an electric device, for example, an organiclight-emitting device. For example, the condensed cyclic compoundrepresented by one of Formulae 1A to 1C may be appropriate for use as ahost for an organic light-emitting device.

For example, the highest occupied molecular orbital (HOMO), lowestunoccupied molecular orbital (LUMO), T₁ energy level, and S₁ energylevel of Compounds 2 to 19 and 21 to 76 and Compounds A and B weresimulated by using Gaussian, and simulation evaluation results are shownin Table 1 below:

TABLE 1 HOMO (eV) LUMO (eV) T₁ (eV) S₁ (eV) Compound A −5.113 −1.252.933 3.224 Compound B −5.118 −1.589 2.856 3.039 Compound 2 −5.344−1.916 2.912 3.02 Compound 3 −5.133 −1.991 2.627 2.731 Compound 4 −5.196−1.798 2.781 2.947 Compound 5 −5.083 −1.792 2.862 2.928 Compound 6 −5.32−1.891 2.74 2.924 Compound 7 −5.167 −1.973 2.424 2.767 Compound 8 −5.167−2.019 2.399 2.728 Compound 9 −5.282 −1.664 2.924 3.04 Compound 11−5.337 −1.933 2.886 3.01 Compound 12 −5.273 −1.953 2.773 2.919 Compound13 −5.308 −1.84 2.733 2.999 Compound 14 −5.259 −1.992 2.47 2.835Compound 15 −5.100 −1.793 2.878 3.040 Compound 16 −5.279 −1.691 2.9013.085 Compound 17 −5.487 −1.957 2.865 3.126 Compound 18 −5.291 −2.0152.455 2.845 Compound 19 −5.284 −1.925 2.508 2.924 Compound 76 −5.343−1.927 2.802 3.023 Compound 21 −5.430 −1.997 2.836 3.012 Compound 22−5.246 −2.021 2.688 2.804 Compound 23 −5.139 −2.004 2.643 2.743 Compound24 −5.269 −2.015 2.727 2.843 Compound 25 −5.252 −2.018 2.7 2.816Compound 26 −5.045 −1.996 2.554 2.649 Compound 27 −5.255 −1.934 2.8112.846 Compound 28 −5.266 −2.011 2.737 2.87 Compound 29 −5.267 −1.9852.713 2.837 Compound 30 −5.419 −1.992 2.697 2.965 Compound 31 −5.243−1.972 2.697 2.821 Compound 32 −5.06 −2.01 2.564 2.656 Compound 33−5.155 −2.007 2.657 2.764 Compound 34 −5.224 −2.004 2.523 2.843 Compound35 −5.213 −2.012 2.538 2.804 Compound 36 −5.256 −1.997 2.693 2.819Compound 37 −5.292 −2.004 2.704 2.837 Compound 38 −5.282 −2.001 2.5592.833 Compound 39 −5.082 −1.974 2.586 2.696 Compound 40 −5.201 −1.9862.64 2.769 Compound 41 −5.111 −1.939 2.576 2.703 Compound 42 −5.17−2.035 2.403 2.726 Compound 43 −5.227 −1.279 2.917 3.191 Compound 44−5.384 −1.78 2.849 3.121 Compound 45 −5.214 −1.222 2.92 3.129 Compound46 −5.295 −1.327 2.918 3.108 Compound 47 −5.269 −1.302 2.915 3.158Compound 48 −5.236 −1.387 2.894 3.057 Compound 49 −5.589 −1.653 2.9863.32 Compound 50 −5.361 −1.704 2.892 3.24 Compound 51 −5.603 −1.9142.907 3.102 Compound 52 −5.252 −1.675 2.927 3.062 Compound 53 −5.509−1.857 2.499 3.107 Compound 54 −5.895 −1.767 2.992 3.297 Compound 55−5.87 −1.693 2.959 3.345 Compound 56 −5.709 −1.642 2.532 3.188 Compound57 −5.819 −1.894 2.667 3.124 Compound 58 −5.436 −2.124 2.924 3.016Compound 59 −5.666 −1.853 2.865 3.096 Compound 60 −5.501 −1.492 2.7133.119 Compound 61 −5.089 −1.762 2.745 3.022 Compound 62 −5.331 −2.0082.827 2.925 Compound 63 −5.097 −1.815 2.053 2.901 Compound 64 −5.314−2.015 2.587 2.804 Compound 65 −5.177 −1.964 2.571 2.816 Compound 66−5.248 −1.655 2.662 3.094 Compound 67 −5.369 −1.413 2.879 3.118 Compound68 −5.153 −1.984 2.785 2.839 Compound 69 −5.094 −1.804 2.734 2.94Compound 70 −5.426 −2.123 2.73 2.977 Compound 71 −5.334 −1.938 2.8682.964 Compound 72 −5.254 −1.915 2.441 2.887 Compound 73 −5.321 −1.9182.894 3.017 Compound 74 −5.276 −1.926 2.305 2.971 Compound 75 −5.016−1.580 2.186 2.964

From Table 1, it is confirmed that Compounds 2 to 19 and 21 to 76 havelower LUMO levels (that is, larger LUMO absolute values) than CompoundsA and B. Accordingly, it is confirmed that the condensed cyclic compoundrepresented by one of Formulae 1A to 1C is appropriate for use as amaterial for an organic layer, for example, an auxiliary layer or anemission layer, of an organic light-emitting device.

A method of synthesizing the condensed cyclic compound represented byone of Formulae 1A to 1C may be apparent to one of ordinary skill in theart by referring to Synthesis Examples used herein.

Accordingly, since the condensed cyclic compound represented by one ofFormulae 1A to 1C is appropriate for use in an organic layer of anorganic light-emitting device, for example, for use as a host in anemission layer of the organic layer, another aspect provides an organiclight-emitting device including:

a first electrode;

a second electrode; and

an organic layer disposed between the first electrode and the secondelectrode,

wherein the organic layer includes an emission layer and at least onecondensed cyclic compound represented by one of Formulae 1A to 1C.

Due to the inclusion of the organic layer including the condensed cycliccompound represented by one of Formulae 1A to 1C, the organiclight-emitting device may have low driving voltage, high efficiency,high brightness, and long lifespan.

The condensed cyclic compound represented by one of Formulae 1A to 1Cmay be used between a pair of electrodes of an organic light-emittingdevice. For example, the condensed cyclic compound may be included in atleast one selected from an emission layer, a hole transport region(including, for example, at least one of a hole injection layer, a holetransport layer, a buffer layer, and an electron blocking layer) that isdisposed between the first electrode and the emission layer, and anelectron transport region (including, for example, at least one selectedfrom a hole blocking layer, an electron transport layer, and an electroninjection layer) that is disposed between the emission layer and thesecond electrode. For example, the condensed cyclic compound representedby one of Formulae 1A to 1C may be included in the emission layer. Inthis regard, the emission layer may further include a dopant, and thecondensed cyclic compound included in the emission layer may act as ahost. The emission layer may be a green emission layer emitting greenlight or a blue emission layer emitting blue light, and the dopant maybe a phosphorescent dopant.

The expression “(an organic layer) includes at least one condensedcyclic compound” as used herein may include a case in which “(an organiclayer) includes identical condensed cyclic compounds represented byFormulae 1A to 1C and a case in which (an organic layer) includes two ormore different condensed cyclic compounds represented by Formulae 1A to1C.

For example, the organic layer may include, as the condensed cycliccompound, only Compound 1. In this regard, Compound 1 may be situated inan emission layer of the organic light-emitting device. In anotherembodiment, the organic layer may include, as the condensed cycliccompound, Compound 1 and Compound 2. In this regard, Compound 1 andCompound 2 may be situated in either an identical layer (for example,Compound 1 and Compound 2 all may be situated in an emission layer), ordifferent layers.

The first electrode may be an anode, which is a hole injectionelectrode, and the second electrode may be a cathode, which is anelectron injection electrode, or the first electrode may be a cathode,which is an electron injection electrode, or the second electrode may bean anode, which is a hole injection electrode.

For example, the first electrode is an anode, and the second electrodeis a cathode, and the organic layer includes;

i) a hole transport region disposed between the first electrode and theemission layer, including at least one of a hole injection layer, a holetransport layer, and an electron blocking layer, and

ii) an electron transport region disposed between the emission layer andthe second electrode, including at least one selected from a holeblocking layer, an electron transport layer, and an electron injectionlayer.

The term “organic layer” as used herein refers to a single layer and/ora plurality of layers disposed between the first electrode and thesecond electrode of an organic light-emitting device. The “organiclayer” may include, in addition to an organic compound, anorganometallic complex including metal.

FIG. 1 is a schematic view of an organic light-emitting device 10according to an embodiment. Hereinafter, the structure of an organiclight-emitting device according to an embodiment and a method ofmanufacturing an organic light-emitting device according to anembodiment will be described in connection with FIG. 1. The organiclight-emitting device 10 includes a first electrode 11, an organic layer15, and a second electrode 19, which are sequentially stacked.

In FIG. 1, a substrate may be additionally disposed under the firstelectrode 11 or above the second electrode 19. For use as the substrate,any substrate that is used in general organic light-emitting devices maybe used, and the substrate may be a glass substrate or transparentplastic substrate, each with excellent mechanical strength, thermalstability, transparency, surface smoothness, ease of handling, andwater-proofness.

The first electrode 11 may be formed by depositing or sputtering amaterial for forming the first electrode on the substrate. The firstelectrode 11 may be an anode. The material for the first electrode 11may be selected from materials with a high work function to allow holesbe easily provided. The first electrode 11 may be a reflective electrodeor a transmissive electrode. The material for the first electrode 11 maybe an indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO₂),or zinc oxide (ZnO). In some embodiments, the material for the firstelectrode 11 may be metal, such as magnesium (Mg), aluminum (Al),aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), ormagnesium-silver (Mg—Ag).

The first electrode 11 may have a single-layer structure or amulti-layer structure including two or more layers. For example, thefirst electrode 11 may have a three-layered structure of ITO/Ag/ITO, butthe structure of the first electrode 110 is not limited thereto.

An organic layer 15 is disposed on the first electrode 11.

The organic layer 15 may include a hole transport region, an emissionlayer, and an electron transport region.

The hole transport region may be disposed between the first electrode 11and the emission layer.

The hole transport region may include at least one of a hole injectionlayer, a hole transport layer, an electron blocking layer, and a bufferlayer.

The hole transport region may include only either a hole injection layeror a hole transport layer. According to another embodiment, the holetransport region may have a structure of hole injection layer/holetransport layer or hole injection layer/hole transport layer/electronblocking layer, which are sequentially stacked in this stated order inthe direction from the first electrode 11.

When the hole transport region includes a hole injection layer (HIL),the hole injection layer may be formed on the first electrode 11 byusing any one of various methods, for example, vacuum deposition, spincoating, casting, or Langmuir-Blodgett (LB) deposition.

When a hole injection layer is formed by vacuum deposition, thedeposition conditions may vary according to a material that is used toform the hole injection layer, and the structure and thermalcharacteristics of the hole injection layer. For example, the depositionconditions may include a deposition temperature of about 100 to about500° C., a vacuum pressure of about 10⁻⁸ to about 10⁻³ torr, and adeposition rate of about 0.01 to about 100 Å/sec. However, thedeposition conditions are not limited thereto.

When the hole injection layer is formed using spin coating, coatingconditions may vary according to the material used to form the holeinjection layer, and the structure and thermal properties of the holeinjection layer. For example, a coating speed may be from about 2,000revolutions per minute (rpm) to about 5,000 rpm, and a temperature atwhich a heat treatment is performed to remove a solvent after coatingmay be from about 80° C. to about 200° C. However, the coatingconditions are not limited thereto.

Conditions for a hole transport layer and an electron blocking layer maybe understood by referring to conditions for forming the hole injectionlayer.

The hole transport region may include at least one selected fromm-MTDATA, TDATA, 2-TNATA, NPB, β-NPB, TPD, Spiro-TPD, Spiro-NPB,methylated NPB, TAPC, HMTPD, 4,4′,4″-tris(N-carbazolyl)triphenylamine(TCTA), polyaniline/dodecylbenzenesulfonic acid (Pani/DBSA),poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS),polyaniline/camphor sulfonic acid (Pani/CSA),(polyaniline)/poly(4-styrenesulfonate) (PANI/PSS), a compoundrepresented by Formula 201 below, and a compound represented by Formula202 below:

Ar₁₀₁ and Ar₁₀₂ in Formula 201 may be each independently selected from

a phenylene group, a pentalenylene group, an indenylene group, anaphthylene group, an azulenylene group, a heptalenylene group, anacenaphthylene group, a fluorenylene group, a phenalenylene group, aphenanthrenylene group, an anthracenylene group, a fluoranthenylenegroup, a triphenylenylene group, a pyrenylene group, a chrysenylenylenegroup, a naphthacenylene group, a picenylene group, a perylenylenegroup, and a pentacenylene group; and

a phenylene group, a pentalenylene group, an indenylene group, anaphthylene group, an azulenylene group, a heptalenylene group, anacenaphthylene group, a fluorenylene group, a phenalenylene group, aphenanthrenylene group, an anthracenylene group, a fluoranthenylenegroup, a triphenylenylene group, a pyrenylene group, a chrysenylenylenegroup, a naphthacenylene group, a picenylene group, a perylenylenegroup, and a pentacenylene group, each substituted with at least one ofa deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid or a salt thereof, a sulfonic acid or a saltthereof, a phosphoric acid or a salt thereof, a C₁-C₆₀ alkyl group, aC₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, aC₃-C₁₀ cycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group.

xa and xb in Formula 201 may be each independently an integer of 0 to 5,or 0, 1 or 2. For example, xa may be 1 and xb may be 0, but xa and xbare not limited thereto.

R₁₀₁ to R₁₀₈, R₁₁₁ to R₁₁₉, and R₁₂₁ to R₁₂₄ in Formulae 201 and 202 maybe each independently selected from

a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid group or a salt thereof, asulfonic acid group or a salt thereof, a phosphoric acid group or a saltthereof, a C₁-C₁₀ alkyl group (for example, a methyl group, an ethylgroup, a propyl group, a butyl group, a pentyl group, a hexyl group, andso on), and a C₁-C₁₀ alkoxy group (for example, a methoxy group, anethoxy group, a propoxy group, a butoxy group, a pentoxy group, and soon);

a C₁-C₁₀ alkyl group and a C₁-C₁₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, and a phosphoric acid or a saltthereof;

a phenyl group, a naphthyl group, an anthracenyl group, a fluorenylgroup, and a pyrenyl group; and

a phenyl group, a naphthyl group, an anthracenyl group, a fluorenylgroup, and a pyrenyl group, each substituted with at least one selectedfrom deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₁-C₁₀ alkyl group, or a C₁-C₁₀ alkoxy group, but they are not limitedthereto.

R₁₀₉ in Formula 201 may be selected from

a phenyl group, a naphthyl group, an anthracenyl group, and a pyridinylgroup; or

a phenyl group, a naphthyl group, an anthracenyl group, and a pyridinylgroup, each substituted with at least one selected from a deuterium, —F,—Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, acarboxylic acid group or a salt thereof, a sulfonic acid group or a saltthereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀ alkylgroup, and a C₁-C₂₀ alkoxy group.

According to an embodiment, the compound represented by Formula 201 maybe represented by Formula 201A below, but is not limited thereto:

R₁₀₁, R₁₁₁, R₁₁₂, and R₁₀₉ in Formula 201A may be understood byreferring to the description provided herein.

For example, the compound represented by Formula 201, and the compoundrepresented by Formula 202 may include compounds HT1 to HT20 illustratedbelow, but are not limited thereto.

A thickness of the hole transport region may be in a range of about 100Angstroms (Å) to about 10,000 Å, for example, about 100 Å to about 1,000Å. When the hole transport region includes both a hole injection layerand a hole transport layer, a thickness of the hole injection layer maybe in a range of about 100 Å to about 10,000 Å, for example, about 100 Åto about 1,000 Å, and a thickness of the hole transport layer may be ina range of about 50 Å to about 2,000 Å, for example about 100 Å to about1,500 Å. When the thicknesses of the hole transport region, the holeinjection layer, and the hole transport layer are within these ranges,satisfactory hole transporting characteristics may be obtained without asubstantial increase in driving voltage.

The hole transport region may further include, in addition to thesematerials, a charge-generation material for the improvement ofconductive properties. The charge-generation material may behomogeneously or non-homogeneously dispersed in the hole transportregion.

The charge-generation material may be, for example, a p-dopant. Thep-dopant may be one of a quinone derivative, a metal oxide, and a cyanogroup-containing compound, but is not limited thereto. Non-limitingexamples of the p-dopant are a quinone derivative, such astetracyanoquinonedimethane (TCNQ) or2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinonedimethane (F4-TCNQ); ametal oxide, such as a tungsten oxide or a molybdenium oxide; and acyano group-containing compound, such as Compound HT-D1 below, but arenot limited thereto.

The hole transport region may include a buffer layer.

Also, the buffer layer may compensate for an optical resonance distanceaccording to a wavelength of light emitted from the emission layer, andthus, efficiency of a formed organic light-emitting device may beimproved.

Then, an emission layer (EML) may be formed on the hole transport regionby vacuum deposition, spin coating, casting, LB deposition, or the like.When the emission layer is formed by vacuum deposition or spin coating,the deposition or coating conditions may be similar to those applied toform the hole injection layer although the deposition or coatingconditions may vary according to the material that is used to form theemission layer.

When the organic light-emitting device is a full color organiclight-emitting device, the emission layer may be patterned into a redemission layer, a green emission layer, and a blue emission layer.According to another embodiment, due to a stacking structure including ared emission layer, a green emission layer, and/or a blue emissionlayer, the emission layer may emit white light.

The emission layer may include at least one condensed cyclic compoundrepresented by one of Formulae 1A to 1C. The emission layer may includea dopant. The dopant may be at least one selected from a phosphorescentdopant and a fluorescent dopant.

The emission layer includes a host and a dopant, and the host mayinclude at least one condensed cyclic compound represented by one ofFormulae 1A to 1C.

According to an embodiment, the emission layer includes a first host anda second host.

The condensed cyclic compound represented by one of Formulae 1A to 1Cmay be included in the emission layer.

The first host may include the condensed cyclic compound represented byone of Formulae 1A to 1C, and the second host may include at least oneselected from a first compound represented by Formula 41 and a secondcompound represented by Formula 61:

wherein in the formulae above,

X₄₁ is N-[(L₄₂)_(a42)-(R₄₂)_(b42)], S, O, S(═O), S(═O)₂, C(═O),C(R₄₃)(R₄₄), Si(R₄₃)(R₄₄), P(R₄₃), P(═O)(R₄₃), or C═N(R₄₃);

Ring A₆₁ in Formula 61 is represented by Formula 61A;

Ring A₆₂ in Formula 61 is represented by Formula 61B;

X₆₁ is N-[(L₆₂)_(a62)-(R₆₂)_(b62)], S, O, S(═O), S(═O)₂, C(═O),C(R₆₃)(R₆₄), Si(R₆₃)(R₆₄), P(R₆₃), P(═O)(R₆₃), or C═N(R₆₃);

X₇₁ is C(R₇₁) or N;

X₇₂ is C(R₇₂) or N;

X₇₃ is C(R₇₃) or N;

X₇₄ is C(R₇₄) or N;

X₇₅ is C(R₇₅) or N;

X₇₆ is C(R₇₆) or N;

X₇₇ is C(R₇₇) or N;

X₇₈ is C(R₇₈) or N;

Ar₄₁, L₄₁, L₄₂, L₆₁, and L₆₂ are each independently selected from asubstituted or unsubstituted C₃-C₁₀ cycloalkylene group, a substitutedor unsubstituted C₂-C₁₀ heterocycloalkylene group, a substituted orunsubstituted C₃-C₁₀ cycloalkenylene group, a substituted orunsubstituted C₂-C₁₀ heterocycloalkenylene group, a substituted orunsubstituted C₆-C₆₀ arylene group, a substituted or unsubstitutedC₂-C₆₀ heteroarylene group, a substituted or unsubstituted divalentnon-aromatic condensed polycyclic group, and a substituted orunsubstituted divalent non-aromatic condensed hetero-polycyclic group;

n1 and n2 are each independently an integer selected from 0 to 3;

a41, a42, a61, and a62 are each independently an integer selected from 0to 3;

R₄₁ to R₄₄, R₅₁ to R₅₄, R₆₁ to R₆₄, and R₇₁ to R₇₉ are eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a substituted or unsubstituted C₁-C₆₀ alkyl group, asubstituted or unsubstituted C₂-C₆₀ alkenyl group, a substituted orunsubstituted C₂-C₆₀ alkynyl group, a substituted or unsubstitutedC₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkylgroup, a substituted or unsubstituted C₂-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₂-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, asubstituted or unsubstituted C₂-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedhetero-polycyclic group, —N(Q₁)(Q₂), —Si(Q₃)(Q₄)(Q₅), and —B(Q₆)(Q₇);

b41, b42, b51 to b54, b61, b62, and b79 are each independently aninteger selected from 1 to 3;

at least one of substituents of the substituted C₁-C₆₀ alkylene group,substituted C₂-C₆₀ alkenylene group, substituted C₃-C₁₀ cycloalkylenegroup, substituted C₂-C₁₀ heterocycloalkylene group, substituted C₃-C₁₀cycloalkenylene group, substituted C₂-C₁₀ heterocycloalkenylene group,substituted C₆-C₆₀ arylene group, substituted C₂-C₆₀ heteroarylenegroup, substituted divalent non-aromatic condensed polycyclic group,substituted divalent non-aromatic condensed hetero-polycyclic group,substituted C₁-C₆₀ alkyl group, substituted C₂-C₆₀ alkenyl group,substituted C₂-C₆₀ alkynyl group, substituted C₁-C₆₀ alkoxy group,substituted C₃-C₁₀ cycloalkyl group, substituted C₂-C₁₀ heterocycloalkylgroup, substituted C₃-C₁₀ cycloalkenyl group, substituted C₂-C₁₀heterocycloalkenyl group, substituted C₆-C₆₀ aryl group, substitutedC₆-C₆₀ aryloxy group, substituted C₆-C₆₀ arylthio group, substitutedC₂-C₆₀ heteroaryl group, a substituted monovalent non-aromatic condensedpolycyclic group, and a substituted monovalent non-aromatic condensedhetero-polycyclic group may be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀ cycloalkylgroup, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, aC₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxygroup, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed hetero-polycyclic group, —N(Q₁₁)(Q₁₂), —Si(Q₁₃)(Q₁₄)(Q₁₅), and—B(Q₁₆)(Q₁₇);

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —N(Q₂₁)(Q₂₂), —Si(Q₂₃)(Q₂₄)(Q₂₅), and—B(Q₂₆)(Q₂₇); and

—N(Q₃₁)(Q₃₂), —Si(Q₃₃)(Q₃₄)(Q₃₅), and —B(Q₃₆)(Q₃₇);

wherein Q₁ to Q₇, Q₁₁ to Q₁₇, Q₂₁ to Q₂₇, and Q₃₁ to Q₃₇ may be eachindependently selected from a hydrogen, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic hetero-condensed polycyclic group.

According to an embodiment, R₄₁ to R₄₄, R₅₁ to R₅₄, R₆₁ to R₆₄, and R₇₁to R₇₉ may be each independently selected from

a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group,a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, and a phosphoric acid or a saltthereof;

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group,an azulenyl group, a heptalenyl group, an indacenyl group, anacenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, aphenanthrenyl group, an anthracenyl group, a fluoranthenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenylgroup, a picenyl group, a perylenyl group, a pentaphenyl group, ahexacenyl group, a pentacenyl group, a rubicenyl group, a coronenylgroup, an ovalenyl group, a pyrrolyl group, a thiophenyl group, afuranyl group, an imidazolyl group, a pyrazolyl group, a thiazolylgroup, an isothiazolyl group, an oxazolyl group, an isooxazolyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, an isoindolyl group, an indolyl group, an indazolyl group, afuranyl group, a quinolinyl group, an isoquinolinyl group, abenzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthridinyl, an acridinyl, a phenanthrolinyl, aphenazinyl, a benzoimidazolyl group, a benzofuranyl group, abenzothiophenyl group, an isobenzothiazolyl group, a benzooxazolylgroup, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group,an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, adibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolylgroup, an imidazopyridinyl group, or an imidazopyrimidinyl group, eachsubstituted with at least one selected from a phenyl group, a pentalenylgroup, an indenyl group, a naphthyl group, an azulenyl group, aheptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isooxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a furanyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl, an acridinyl, aphenanthrolinyl, a phenazinyl, a benzoimidazolyl group, a benzofuranylgroup, a benzothiophenyl group, an isobenzothiazolyl group, abenzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, an imidazopyridinyl group, animidazopyrimidinyl group, and a biphenyl group; and

-   -   a phenyl group, a pentalenyl group, an indenyl group, a naphthyl        group, an azulenyl group, a heptalenyl group, an indacenyl        group, an acenaphthyl group, a fluorenyl group, a        spiro-fluorenyl group, a benzofluorenyl group, a        dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl        group, an anthracenyl group, a fluoranthenyl group, a        triphenylenyl group, a pyrenyl group, a chrysenyl group, a        naphthacenyl group, a picenyl group, a perylenyl group, a        pentaphenyl group, a hexacenyl group, a pentacenyl group, a        rubicenyl group, a coronenyl group, an ovalenyl group, a        pyrrolyl group, a thiophenyl group, a furanyl group, an        imidazolyl group, a pyrazolyl group, a thiazolyl group, an        isothiazolyl group, an oxazolyl group, an isooxazolyl group, a        pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a        pyridazinyl group, an isoindolyl group, an indolyl group, an        indazolyl group, a purinyl group, a quinolinyl group, an        isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl        group, a naphthyridinyl group, a quinoxalinyl group, a        quinazolinyl group, a cinnolinyl group, a carbazolyl group, a        phenanthridinyl group, an acridinyl group, a phenanthrolinyl        group, a phenazinyl group, a benzoimidazolyl group, a        benzofuranyl group, a benzothiophenyl group, an        isobenzothiazolyl group, a benzooxazolyl group, an        isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an        oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a        dibenzothiophenyl group, a benzocarbazolyl group, a        dibenzocarbazolyl group, an imidazopyridinyl group, and an        imidazopyrimidinyl group, each substituted with at least one        selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a        cyano group, a nitro group, an amino group, an amidino group, a        hydrazine group, a hydrazone group, carboxylic acid or a salt        thereof, sulfonic acid or a salt thereof, phosphoric acid or a        salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group,        —Si(Q₃₃)(Q₃₄)(Q₃₅), a phenyl group, a pentalenyl group, an        indenyl group, a naphthyl group, an azulenyl group, a heptalenyl        group, an indacenyl group, an acenaphthyl group, a fluorenyl        group, a spiro-fluorenyl group, a benzofluorenyl group, a        dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl        group, an anthracenyl group, a fluoranthenyl group, a        triphenylenyl group, a pyrenyl group, a chrysenyl group, a        naphthacenyl group, a picenyl group, a perylenyl group, a        pentaphenyl group, a hexacenyl group, a pentacenyl group, a        rubicenyl group, a coronenyl group, an ovalenyl group, a        pyrrolyl group, a thiophenyl group, a furanyl group, an        imidazolyl group, a pyrazolyl group, a thiazolyl group, an        isothiazolyl group, an oxazolyl group, an isooxazolyl group, a        pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a        pyridazinyl group, an isoindolyl group, an indolyl group, an        indazolyl group, a purinyl group, a quinolinyl group, an        isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl        group, a naphthyridinyl group, a quinoxalinyl group, a        quinazolinyl group, a cinnolinyl group, a carbazolyl group, a        phenanthridinyl group, an acridinyl group, a phenanthrolinyl        group, a phenazinyl group, a benzoimidazolyl group, a        benzofuranyl group, a benzothiophenyl group, an        isobenzothiazolyl group, a benzooxazolyl group, an        isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an        oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a        dibenzothiophenyl group, a benzocarbazolyl group, a        dibenzocarbazolyl group, an imidazopyridinyl group, an        imidazopyrimidinyl group, and a biphenyl group; and

—Si(Q₃)(Q₄)(Q₅),

wherein Q₃ to Q₅ and Q₃₃ to Q₃₅ are each independently selected from ahydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, anaphthyl group, an anthracenyl group, a pyrenyl group, a phenanthrenylgroup, a fluorenyl group, a chrysenyl group, a carbazolyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a dibenzofuranylgroup, a dibenzothiophenyl group, a pyridinyl group, a pyrimidinylgroup, a triazinyl group, a quinolinyl group, an isoquinolinyl group, aquinazolinyl group, and a quinoxalinyl group, but are not limitedthereto.

For example, the first compound may be represented by one of Formulae41-1 to 41-12 below, and the second compound may be represented by oneof Formulae 61-1 to 61-6:

X₄₁, X₆₁, L₄₁, L₄₂, a41, a42, L₆₁, L₆₂, a61, a62, R₄₁ to R₄₄, b41, b42,R₆₁ to R₆₄, b61, b62, R₇₁ to, R₇₆ and b79 in Formulae 41-1 to 41-12 and61-1 to 61-6 are as described above.

For example, when the second host includes the first compoundrepresented by Formula 41, at least one selected from R₄₁, R₄₂, and R₅₂of the first compound, and when the second host includes the secondcompound represented by Formula 61, at least one selected from R₆₁ andR₆₂ of the second compound may be each independently selected from

a thiophenyl group, a furanyl group, a carbazolyl group, an acridinylgroup, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a phenyl group, apentalenyl group, an indenyl group, a naphthyl group, an azulenyl group,a heptalenyl group, an indacenyl group, an acenaphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, and an ovalenyl group; and

a thiophenyl group, a furanyl group, a carbazolyl group, acridinyl, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, a phenyl group, a pentalenyl group, anindenyl group, a naphthyl group, an azulenyl group, a heptalenyl group,an indacenyl group, an acenaphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenalenyl group, a phenanthrenyl group, an anthracenyl group, afluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenylgroup, a naphthacenyl group, a picenyl group, a perylenyl group, apentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenylgroup, a coronenyl group. and an ovalenyl group, each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, carboxylic acid or a salt thereof,sulfonic acid or a salt thereof, phosphoric acid or a salt thereof, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a phenylgroup substituted with C₁-C₂₀ alkyl group, a naphthyl group, aphenalenyl group, a phenanthrenyl group, an anthracenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, abiphenyl group, and —Si(Q₃₃)(Q₃₄)(Q₃₅),

wherein Q₃₃ to Q₃₅ may be each independently selected from a hydrogen, aC₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, an anthracenyl group, a pyrenyl group, a phenanthrenyl group, afluorenyl group, a chrysenyl group, a carbazolyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a dibenzofuranylgroup, a dibenzothiophenyl group, a pyridinyl group, a pyrimidinylgroup, a triazinyl group, a quinolinyl group, an isoquinolinyl group, aquinazolinyl group, and a quinoxalinyl group.

In some embodiments, when the second host includes the first compoundrepresented by Formula 41, at least one selected from R₄₁, R₄₂, and R₅₂of the first compound, and when the second host includes the secondcompound represented by Formula 61, at least one selected from R₆₁ andR₆₂ of the second compound may be represented by one of Formulae 5-1 to5-6 and 6-1 to 6-5.

According to an embodiment, the first compound represented by Formula 41may include one of Compounds A1 to A83 below, and the second compoundrepresented by Formula 61 may include one of Compounds B1 to B20, butthey are not limited thereto:

When the first host and the second host all are included in an emissionlayer, holes and electrons provided to the emission layer may beeffectively controlled. Accordingly, an organic light-emitting devicewith high luminescent efficiency and long lifespan may be obtained.

A weight ratio of the first host to the second host in the emissionlayer may be each independently in a range of 1:99 to 99:1, for example,10:90 to 90:10. When the weight ratio of the first host and the secondhost is within these ranges, holes and electrons provided to theemission layer may be effectively controlled.

A dopant in the emission layer may be a fluorescent dopant that emitslight according to a fluorescent emission mechanism or a phosphorescentdopant that emits light according to a phosphorescent emissionmechanism.

According to an embodiment, the dopant in the emission layer may be aphosphorescent dopant, and the phosphorescent dopant may include anorganometallic compound represented by Formula 81 below:

wherein in Formula 81,

M may be selected from iridium (Ir), platinum (Pt), osmium (Os),titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium(Tb), and thulium (Tm);

Y₁ to Y₄ are each independently carbon (C) or nitrogen (N);

Y₁ and Y₂ are linked via a single bond or a double bond, and Y₃ and Y₄are linked via a single bond or a double bond;

CY₁ and CY₂ are each independently selected from a benzene, anaphthalene, a fluorene, a spiro-fluorene, an indene, a pyrrole, athiophene, a furan, an imidazole, a pyrazole, a thiazole, anisothiazole, an oxazole, an isooxazole, a pyridine, a pyrazine, apyrimidine, a pyridazine, a quinoline, an isoquinoline, abenzoquinoline, a quinoxaline, a quinazoline, a carbazole, abenzoimidazole, a benzofuran, a benzothiophene, an isobenzothiophene, abenzooxazole, an isobenzooxazole, a triazole, a tetrazole, anoxadiazole, a triazine, a dibenzofuran, and a dibenzothiophene, and CY₁and CY₂ are optionally linked to each other through a single bond or anorganic linking group;

R₈₁ to R₈₂ may be each independently a hydrogen, a deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group,an amidino group, a hydrazine group, a hydrazone group, a carboxylicacid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoricacid or a salt thereof, —SF₅, a substituted or unsubstituted C₁-C₆₀alkyl group, a substituted or unsubstituted C₂-C₆₀ alkenyl group, asubstituted or unsubstituted C₂-C₆₀ alkynyl group, a substituted orunsubstituted C₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀cycloalkyl group, a substituted or unsubstituted C₂-C₁₀ heterocycloalkylgroup, a substituted or unsubstituted C₃-C₁₀ cycloalkenyl group, asubstituted or unsubstituted C₂-C₁₀ heterocycloalkenyl group, asubstituted or unsubstituted C₆-C₆₀ aryl group, a substituted orunsubstituted C₆-C₆₀ aryloxy group, a substituted or unsubstitutedC₆-C₆₀ arylthio group, a substituted or unsubstituted C₂-C₆₀ heteroarylgroup, a substituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, a substituted or unsubstituted monovalent non-aromaticcondensed heteropolycyclic group, —N(Q₁)(Q₂), —Si(Q₃)(Q₄)(Q₅), or—B(Q₆)(Q₇);

a81 and a82 are each independently an integer of 1 to 5;

n81 is an integer of 0 to 4;

n82 is 1, 2, or 3; and

L₈₁ is a monovalent organic ligand, a divalent organic ligand, or atrivalent organic ligand.

R₈₁ and R₈₂ may be understood by referring to the description providedherein in connection with R₄₁.

The phosphorescent dopant may include at least one of Compounds PD1 toPD78 below, but is not limited thereto:

According to another embodiment, the phosphorescent dopant may includePtOEP illustrated below:

The fluorescent dopant may include at least one selected from DPAVBi,BDAVBi, TBPe, DCM, DCJTB, Coumarin 6, and C545T.

When the emission layer includes a host and a dopant, an amount of thedopant may be in a range of about 0.01 to about 20 parts by weight basedon 100 parts by weight of the host, but is not limited thereto.

A thickness of the emission layer may be in a range of about 100 Å toabout 1,000 Å, for example, about 200 Å to about 600 Å. When thethickness of the emission layer is within this range, excellentlight-emission characteristics may be obtained without a substantialincrease in driving voltage.

Then, an electron transport region may be disposed on the emissionlayer.

The electron transport region may include at least one selected from ahole blocking layer, an electron transport layer, and an electroninjection layer.

For example, the electron transport region may have a structure of holeblocking layer/electron transport layer/electron injection layer or astructure of electron transport layer/electron injection layer, but thestructure of the electron transport region is not limited thereto. Theelectron transport layer may have a single-layered structure or amulti-layer structure including two or more different materials.

Conditions for forming the hole blocking layer, the electron transportlayer, and the electron injection layer which constitute the electrontransport region may be understood by referring to the conditions forforming the hole injection layer.

When the electron transport layer includes a hole blocking layer, thehole blocking layer may include, for example, at least one of BCP andBphen, but may also include other materials.

A thickness of the hole blocking layer may be in a range of about 20 Åto about 1,000 Å, for example, about 30 Å to about 300 Å. When thethickness of the hole blocking layer is within these ranges, the holeblocking layer may have excellent hole blocking characteristics withouta substantial increase in driving voltage.

The electron transport layer may further include, in addition to theorganometallic compound represented by Formula 1, at least one selectedfrom BCP, Bphen, Alq₃, Balq, TAZ, and NTAZ.

According to another embodiment, the electron transport layer mayinclude at least one of ET1 and ET2, but are not limited thereto:

A thickness of the electron transport layer may be in a range of about100 Å to about 1,000 Å, for example, about 150 Å to about 500 Å. Whenthe thickness of the electron transport layer is within the rangedescribed above, the electron transport layer may have satisfactoryelectron transport characteristics without a substantial increase indriving voltage.

Also, the electron transport layer may further include, in addition tothe materials described above, a metal-containing material.

The metal-containing material may include a Li complex. The Li complexmay include, for example, Compound ET-D1 (lithium quinolate, LiQ) orET-D2.

The electron transport region may include an electron injection layer(EIL) that allows electrons to be easily provided from a secondelectrode 19.

The electron injection layer may include at least one selected from,LiF, NaCl, CsF, Li₂O, BaO, and LiQ.

A thickness of the electron injection layer may be in a range of about 1Å to about 100 Å, for example, about 3 Å to about 90 Å. When thethickness of the electron injection layer is within the range describedabove, the electron injection layer may have satisfactory electroninjection characteristics without a substantial increase in drivingvoltage.

The second electrode 19 is disposed on the organic layer 15. The secondelectrode 19 may be a cathode. A material for forming the secondelectrode 19 may be metal, an alloy, an electrically conductivecompound, and a combination thereof, which have a relatively low workfunction. For example, lithium (Li), magnesium (Mg), aluminum (Al),aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), ormagnesium-silver (Mg—Ag) may be used as the material for forming thesecond electrode 19. To manufacture a top emission type light-emittingdevice, a transmissive electrode formed using ITO or IZO may be used asthe second electrode 19.

Hereinbefore, the organic light-emitting device has been described withreference to FIG. 1, but is not limited thereto.

A C₁-C₆₀ alkyl group used herein refers to a linear or branchedaliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms.Detailed examples thereof are a methyl group, an ethyl group, a propylgroup, an isobutyl group, a sec-butyl group, a tert-butyl group, apentyl group, an iso-amyl group, and a hexyl group. A C₁-C₆₀ alkylenegroup used herein refers to a divalent group having the same structureas the C₁-C₆₀ alkyl group.

A C₁-C₆₀ alkoxy group used herein refers to a monovalent grouprepresented by —OA₁₀₁ (wherein A₁₀₁ is the C₁-C₆₀ alkyl group). Detailedexamples thereof are a methoxy group, an ethoxy group, and anisopropyloxy group.

A C₂-C₆₀ alkenyl group used herein refers to a hydrocarbon group formedby substituting at least one carbon double bond in the middle or at theterminal of the C₂-C₆₀ alkyl group. Detailed examples thereof are anethenyl group, a propenyl group, and a butenyl group. A C₂-C₆₀alkenylene group used herein refers to a divalent group having the samestructure as the C₂-C₆₀ alkenyl group.

A C₂-C₆₀ alkynyl group used herein refers to a hydrocarbon group formedby substituting at least one carbon triple bond in the middle or at theterminal of the C₂-C₆₀ alkyl group. Detailed examples thereof are anethynyl group, and a propynyl group. A C₂-C₆₀ alkynylene group usedherein refers to a divalent group having the same structure as theC₂-C₆₀ alkynyl group.

A C₃-C₁₀ cycloalkyl group used herein refers to a monovalent hydrocarbonmonocyclic group having 3 to 10 carbon atoms. Detailed examples thereofare a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, acyclohexyl group, and a cycloheptyl group. A C₃-C₁₀ cycloalkylene groupused herein refers to a divalent group having the same structure as theC₃-C₁₀ cycloalkyl group.

A C₂-C₁₀ heterocycloalkyl group used herein refers to a monovalentmonocyclic group having at least one hetero atom selected from N, O, P,and S as a ring-forming atom and 2 to 10 carbon atoms. Detailed examplesthereof are a tetrahydrofuranyl group, and a tetrahydrothiophenyl group.A C₂-C₁₀ heterocycloalkylene group used herein refers to a divalentgroup having the same structure as the C₂-C₁₀ heterocycloalkyl group.

A C₃-C₁₀ cycloalkenyl group used herein refers to a monovalentmonocyclic group that has 3 to 10 carbon atoms and at least one doublebond in the ring thereof and does not have aromaticity. Detailedexamples thereof are a cyclopentenyl group, a cyclohexenyl group, and acycloheptenyl group. A C₃-C₁₀ cycloalkenylene group used herein refersto a divalent group having the same structure as the C₃-C₁₀ cycloalkenylgroup.

A C₂-C₁₀ heterocycloalkenyl group used herein refers to a monovalentmonocyclic group that has at least one hetero atom selected from N, O,P, and S as a ring-forming atom, 2 to 10 carbon atoms, and at least onedouble bond in its ring. Detailed examples of the C₂-C₁₀heterocycloalkenyl group are a 2,3-dihydrofuranyl group and a2,3-dihydrothiophenyl group. A C₂-C₁₀ heterocycloalkenylene group usedherein refers to a divalent group having the same structure as theC₂-C₁₀ heterocycloalkenyl group.

A C₆-C₆₀ aryl group used herein refers to a monovalent group having acarbocyclic aromatic system having 6 to 60 carbon atoms, and a C₆-C₆₀arylene group used herein refers to a divalent group having acarbocyclic aromatic system having 6 to 60 carbon atoms. Detailedexamples of the C₆-C₆₀ aryl group are a phenyl group, a naphthyl group,an anthracenyl group, a phenanthrenyl group, a pyrenyl group, and achrysenyl group. When the C₆-C₆₀ aryl group and the C₆-C₆₀ arylene groupeach include two or more rings, the rings may be fused to each other.

A C₂-C₆₀ heteroaryl group used herein refers to a monovalent grouphaving a carbocyclic aromatic system that has at least one hetero atomselected from N, O, P, and S as a ring-forming atom, and 2 to 60 carbonatoms. A C₂-C₆₀ heteroarylene group used herein refers to a divalentgroup having a carbocyclic aromatic system that has at least one heteroatom selected from N, O, P, and S as a ring-forming atom, and 2 to 60carbon atoms. Examples of the C₂-C₆₀ heteroaryl group are a pyridinylgroup, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, atriazinyl group, a quinolinyl group, and an isoquinolinyl group. Whenthe C₂-C₆₀ heteroaryl group and the C₂-C₆₀ heteroarylene group eachinclude two or more rings, the rings may be fused to each other.

A C₆-C₆₀ aryloxy group used herein indicates —OA₁₀₂ (wherein A₁₀₂ is theC₆-C₆₀ aryl group), and a C₆-C₆₀ arylthio group indicates —SA₁₀₃(wherein A₁₀₃ is the C₆-C₆₀ aryl group).

A monovalent non-aromatic condensed polycyclic group used herein refersto a monovalent group that has two or more rings condensed to eachother, only carbon atoms (for example, the number of carbon atoms may bein a range of 8 to 60) as ring forming atoms, wherein the molecularstructure as a whole is non-aromatic in the entire molecular structure.An example of the monovalent non-aromatic condensed polycyclic group isa fluorenyl group. A divalent non-aromatic condensed polycyclic groupused herein refers to a divalent group having the same structure as themonovalent non-aromatic condensed polycyclic group.

A monovalent non-aromatic condensed hetero-polycyclic group used hereinrefers to a monovalent group that has two or more rings condensed toeach other, has a heteroatom selected from N, O P, and S, other thancarbon atoms (for example, the number of carbon atoms may be in a rangeof 2 to 60), as ring-forming atoms, wherein the molecular structure as awhole is non-aromatic in the entire molecular structure. An example ofthe monovalent non-aromatic condensed hetero-polycyclic group is acarbazolyl group. A divalent non-aromatic condensed hetero-polycyclicgroup used herein refers to a divalent group having the same structureas the monovalent non-aromatic condensed hetero-polycyclic group.

In the present specification, at least one of substituents ofsubstituents of the substituted C₁-C₆₀ alkylene group, substitutedC₂-C₆₀ alkenylene group, substituted C₂-C₆₀ alkynylene group,substituted C₃-C₁₀ cycloalkylene group, substituted C₂-C₁₀heterocycloalkylene group, substituted C₃-C₁₀ cycloalkenylene group,substituted C₂-C₁₀ heterocycloalkenylene group, substituted C₆-C₆₀arylene group, substituted C₂-C₆₀ heteroarylene group, substituteddivalent non-aromatic condensed polycyclic group, substituted divalentnon-aromatic condensed hetero-polycyclic group, substituted C₁-C₆₀ alkylgroup, substituted C₂-C₆₀ alkenyl group, substituted C₂-C₆₀ alkynylgroup, substituted C₃-C₁₀ cycloalkyl group, substituted C₂-C₁₀heterocycloalkyl group, substituted C₃-C₁₀ cycloalkenyl group,substituted C₂-C₁₀ heterocycloalkenyl group, substituted C₆-C₆₀ arylgroup, substituted C₆-C₆₀ aryloxy group, substituted C₆-C₆₀ arylthiogroup, substituted C₂-C₆₀ heteroaryl group, substituted monovalentnon-aromatic condensed polycyclic group, and substituted monovalentnon-aromatic condensed hetero-polycyclic group may be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀ cycloalkylgroup, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, aC₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxygroup, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed hetero-polycyclic group, —N(Q₁₁)(Q₁₂), —Si(Q₁₃)(Q₁₄)(Q₁₅), and—B(Q₁₆)(Q₁₇);

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed hetero-polycyclic group, —N(Q₂₁)(Q₂₂), —Si(Q₂₃)(Q₂₄)(Q₂₅), and—B(Q₂₆)(Q₂₇); and

—N(Q₃₁)(Q₃₂), —Si(Q₃₃)(Q₃₄)(Q₃₅), and —B(Q₃₆)(Q₃₇), wherein

Q₁ to Q₇, Q₁₁ to Q₁₇, and Q₃₁ to Q₃₇ used herein may be eachindependently selected from a hydrogen, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed hetero-polycyclic group.

In the present specification, at least one of substituents of thesubstituted C₁-C₆₀ alkylene group, substituted C₂-C₆₀ alkenylene group,substituted C₂-C₆₀ alkynylene group, substituted C₃-C₁₀ cycloalkylenegroup, substituted C₂-C₁₀ heterocycloalkylene group, substituted C₃-C₁₀cycloalkenylene group, substituted C₂-C₁₀ heterocycloalkenylene group,substituted C₆-C₆₀ arylene group, substituted C₂-C₆₀ heteroarylenegroup, substituted divalent non-aromatic condensed polycyclic group,substituted divalent non-aromatic condensed hetero-polycyclic group,substituted C₁-C₆₀ alkyl group, substituted C₂-C₆₀ alkenyl group,substituted C₂-C₆₀ alkynyl group, substituted C₃-C₁₀ cycloalkyl group,substituted C₂-C₁₀ heterocycloalkyl group, substituted C₃-C₁₀cycloalkenyl group, substituted C₂-C₁₀ heterocycloalkenyl group,substituted C₆-C₆₀ aryl group, substituted C₆-C₆₀ aryloxy group,substituted C₆-C₆₀ arylthio group, substituted C₂-C₆₀ heteroaryl group,substituted monovalent non-aromatic condensed polycyclic group, andsubstituted monovalent non-aromatic condensed hetero-polycyclic groupmay be selected from

a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid ora salt thereof, a phosphoric acid or a salt thereof, a C₃-C₁₀ cycloalkylgroup, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, aC₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxygroup, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed hetero-polycyclic group, —N(Q₁₁)(Q₁₂), —Si(Q₁₃)(Q₁₄)(Q₁₆), and—B(Q₁₆)(Q₁₇);

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group,an azulenyl group, a heptalenyl group, an indacenyl group, anacenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, aphenalenyl group, a phenanthrenyl group, an anthracenyl group, afluoranthrenyl group, a triphenylenyl group, a pyrenyl group, achrysenyl group, a naphthacenyl group, a picenyl group, a perylenylgroup, a pentaphenyl group, a hexacenyl group, a pyrrolyl group, animidazolyl group, a pyrazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzooxazolyl group, a benzoimidazolyl group, a furanyl group, abenzofuranyl group, a thiophenyl group, a benzothiophenyl group, athiazolyl group, an isothiazolyl group, a benzothiazolyl group, anisooxazolyl group, an oxazolyl group, a triazolyl group, a tetrazolylgroup, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group,a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolylgroup, an imidazopyrimidinyl group, and an imidazopyridinyl group, eachsubstituted with at least one selected from a cyclopentyl group, acyclohexyl group, a cycloheptyl group, cyclooctyl group, a cyclopentenylgroup, a cyclohexenyl group, a cycloheptenyl group, a phenyl group, anaphthyl group, an anthracenyl group, a pyrenyl group, a phenanthrenylgroup, a fluorenyl group, a carbazolyl group, a benzocarbazolyl group, adibenzocarbazolyl group, a pyridinyl group, a pyrimidinyl group, apyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinylgroup, an isoquinolinyl group, a phthalazinyl group, a quinoxalinylgroup, a cinnolinyl group, and a quinazolinyl group;

a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group,an azulenyl group, a heptalenyl group, an indacenyl group, anacenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, aphenalenyl group, a phenanthrenyl group, an anthracenyl group, afluoranthrenyl group, a triphenylenyl group, a pyrenyl group, achrysenyl group, a naphthacenyl group, a picenyl group, a perylenylgroup, a pentaphenyl group, a hexacenyl group, a pyrrolyl group, animidazolyl group, a pyrazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a furanyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzooxazolyl group, a benzoimidazolyl group, a furanyl group, abenzofuranyl group, a thiophenyl group, a benzothiophenyl group, athiazolyl group, an isothiazolyl group, a benzothiazolyl group, anisooxazolyl group, an oxazolyl group, a triazolyl group, a tetrazolylgroup, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group,a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolylgroup, an imidazopyrimidinyl group, and an imidazopyridinyl group, eachsubstituted with at least one selected from a cyclopentyl group, acyclohexyl group, a cycloheptyl group, a cyclooctyl group, acyclopentenyl group, a cyclohexenyl group, a cycloheptenyl group, aphenyl group, a naphthyl group, an anthracenyl group, a pyrenyl group, aphenanthrenyl group, a fluorenyl group, a carbazolyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a pyridinyl group, apyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinylgroup, a quinolinyl group, an isoquinolinyl group, a phthalazinyl group,a quinoxalinyl group, a cinnolinyl group, and a quinazolinyl group, eachsubstituted with at least one selected from a deuterium, —F, —CI, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, carboxylic acid ora salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid ora salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, aC₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, monovalent non-aromatichetero-condensed polycyclic group, —N(Q₂₁)(Q₂₂), —Si(Q₂₃)(Q₂₄)(Q₂₅), and—B(Q₂₆)(Q₂₇); and

—N(Q₃₁)(Q₃₂), —Si(Q₃₃)(Q₃₄)(Q₃₅), and —B(Q₃₆)(Q₃₇),

wherein Q₁ to Q₇, Q₁₁ to Q₁₇, and Q₃₁ to Q₃₇ may be each independently aphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, anazulenyl group, a heptalenyl group, an indacenyl group, an acenaphthylgroup, a fluorenyl group, a spiro-fluorenyl group, a phenalenyl group, aphenanthrenyl group, an anthracenyl group, a fluoranthrenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenylgroup, a picenyl group, a perylenyl group, a pentaphenyl group, ahexacenyl group, a pyrrolyl group, an imidazolyl group, a pyrazolylgroup, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, apyridazinyl group, an isoindolyl group, an indolyl group, an indazolylgroup, a furanyl group, a quinolinyl group, an isoquinolinyl group, abenzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthridinyl group, an acridinyl group, aphenanthrolinyl group, a phenazinyl group, a benzooxazolyl group, abenzoimidazolyl group, a furanyl group, a benzofuranyl group, athiophenyl group, a benzothiophenyl group, a thiazolyl group, anisothiazolyl group, a benzothiazolyl group, an isooxazolyl group, anoxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolylgroup, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenylgroup, a benzocarbazolyl group, a dibenzocarbazolyl group, animidazopyrimidinyl group, and an imidazopyridinyl group, eachsubstituted with at least one selected from a hydrogen, a C₁-C₆₀ alkylgroup, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxygroup, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, acyclooctyl group, a cyclopentenyl group, a cyclohexenyl group, acycloheptenyl group, a phenyl group, a naphthyl group, an anthracenylgroup, a pyrenyl group, a phenanthrenyl group, a fluorenyl group, acarbazolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, apyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinylgroup, a triazinyl group, a quinolinyl group, an isoquinolinyl group, aphthalazinyl group, a quinoxalinyl group, a cinnolinyl group, or aquinazolinyl group, but they are not limited thereto.

The term “biphenyl group” as used therein refers to “a phenyl groupsubstituted with a phenyl group.”

Hereinafter, a compound and an organic light-emitting device accordingto embodiments are described in detail with reference to SynthesisExample and Examples. However, the organic light-emitting device is notlimited thereto. The wording “B was used instead of A” used indescribing Synthesis Examples means that a molar equivalent of A wasidentical to a molar equivalent of B.

EXAMPLES Synthesis Example 1 Synthesis of Compound 3

Synthesis of Intermediate 3-5

Intermediate 3-6 (10 g, 59.8 mmol) and Intermediate A (8.44 g, 59.8mmol) were dissolved in 200 mL of DMSO, and then, Cs₂CO₃ (23.4 g, 71.8mmol) was added to the resultant and stirred for 15 hours. 500 mL ofwater was added to the reaction product, and the resultant was filteredand a solid was collected. The solid was dissolved in 300 mL ofmethylene chloride, and 300 mL of water was added thereto, and then theresultant was extracted. An organic layer obtained therefrom was driedby using MgSO₄, and the residual obtained by evaporating the solvent wasseparation-purified by silica gel column chromatography to obtainIntermediate 3-5 (12.93 g, yield of 75%). The obtained compound wasidentified by LC-MS.

C₁₈H₁₂N₂O₂: M+ 288.09

Synthesis of Intermediate 3-4

Intermediate 3-5 (10 g, 34.7 mmol) and SnCl₂.2H₂O (25.16 g, 111 mmol)was added to EtOH and then, the mixture was heated to 70° C. for 8 hoursor more. When the reaction stopped, the reaction product was cooled toroom temperature, and then, concentrated, and an organic layer obtainedby adding 300 mL of methylene chloride and 300 mL of NaHCO₃ (aq) theretowas dried by using MgSO₄, and the residual obtained by evaporating thesolvent was separation-purified by silica gel column chromatography toobtain Intermediate 3-4 (6.27 g, yield of 70%). The obtained compoundwas identified by LC-MS.

C₁₈H₁₄N₂: M+ 258.12

Synthesis of Intermediate 3-3

Intermediate 3-4 (6 g, 23.23 mmol), 60 mL of acetic acid, 5 mL of conc.H₂SO₄ in a reaction container were deposited to an ice bath to decreasethe temperature to 10° C. Then, NaNO₂ (1.6 g, 1 eq) was dissolved in 150mL of water, and the resultant was added dropwise thereto for 20minutes, and stirred for 10 minutes, and then, the temperature of themixture was raised to 130° C., and then stirred for 20 minutes. When thereaction stopped, the temperature was decreased to room temperature, andthen, 300 mL of water was added thereto, and filtered to isolate aprecipitated solid. The residual was separation-purified by silica gelcolumn chromatography to obtain Intermediate 3-3 (4.03 g, 72%). Theobtained compound was identified by LC-MS.

C₁₈H₁₁N: M+ 241.09

Synthesis of Intermediate 3-2

Intermediate 3-3 (3 g, 12.43 mmol) and NBS (2.21 g, 12.43 mmol) weredissolved in 100 mL of methylene chloride, and then, the mixture wasstirred at room temperature for 15 hours. When the reaction stopped, thereaction product was cooled to room temperature, and 200 mL of methylenechloride was added thereto, and then 200 mL of water was added dropwisethereto, and an obtained organic layer was dried by using MgSO₄, and theresidual obtained by evaporating the solvent was separation-purified bysilica gel column chromatography to obtain Intermediate 3-2 (2.03 g,51%). The obtained compound was identified by LC-MS.

C₁₈H₁₀BrN: M+ 319.00

Synthesis of Intermediate 3-1

Intermediate 3-2 (1.5 g, 4.68 mmol), Intermediate B (1.19 g, 5.62 mmol),Pd(PPh₃)₄ (0.27 g, 0.234 mmol), and K₂CO₃ (3.24 g, 23.4 mmol) were mixedwith 100 mL of THF and 30 mL of distilled water. The mixture was heatedto a temperature of 120° C. and stirred for 24 hours while refluxing,and then, cooled to room temperature, and extracted using 200 mL ofwater and 200 mL of methylene chloride. An organic layer obtainedtherefrom was dried by using MgSO₄, and the residual obtained byevaporating the solvent was separation-purified by silica gel columnchromatography to obtain Intermediate 3-1 (1.5 g, 79%). The obtainedcompound was identified by LC-MS.

C₃₀H₁₈N₂: M+ 406.15

Synthesis of Compound 3

Intermediate 3-1 (1 g, 2.46 mmol) was dissolved in 30 mL of DMF, andthen, sodium hydride was added thereto, and the result was stirred for 1hour. Intermediate C (0.8 g, 2.95 mmol) dissolved in 10 mL of DMF wasadded thereto, and then, stirred for 12 hours at room temperature.Resulting precipitate was washed with methylene chloride, and then addedto dichlorobenzene, and the result was heated, and then, while coolingto room temperature, recrystallized and separated to obtain Compound 3(1.14 g, 65%). The obtained compound was identified by LC-MS and NMR.

C₅₁H₃₁N₅: M+ 713.26

1H NMR (CDCl₃, 300 MHz) δ (ppm) 8.36-8.19 (m, 11H), 7.89 (s, 1H),7.68-7.50 (m, 16H), 7.20 (m, 3H)

Synthesis Example 2 Synthesis of Compound 2

Compound 2 (68%) was synthesized in the same manner as in SynthesisExample 1, except that in synthesizing Compound 3, Intermediate D wasused instead of Intermediate C. The obtained compound was identified byLC-MS and NMR.

C₄₅H₂₇N₅: M+ 637.75

1H NMR (CDCl₃, 300 MHz) δ (ppm) 7.36-8.30 (m, 5H), 8.19-8.13 (m, 4H),7.89 (s, 1H), 7.65-7.50 (m, 14H), 7.20 (m, 3H)

Synthesis Example 3 Synthesis of Compound 4

Compound 4 (70%) was synthesized in the same manner as in SynthesisExample 1, except that in synthesizing Compound 3, Intermediate E wasused instead of Intermediate C. The obtained compound was identified byLC-MS and NMR.

C₄₆H₂₈N4: M+ 636.23

1H NMR (CDCl₃, 300 MHz) δ (ppm) 8.9 (s, 1H), 8.30-8.13 (m, 5H),7.94-7.89 (m, 5H), 7.65-7.50 (m, 14H), 7.20 (m, 3H)

Synthesis Example 4 Synthesis of Compound 7

Compound 7 (62%) was synthesized in the same manner as in SynthesisExample 1, except that in synthesizing Compound 3, Intermediate F wasused instead of Intermediate C. The obtained compound was identified byLC-MS and NMR.

C₄₄H₂₆N₄: M+ 610.22

1H NMR (CDCl₃, 300 MHz) δ (ppm) 8.30-8.13 (m, 6H), 7.89-7.80 (m, 5H),7.65-7.50 (m, 12H), 7.20 (m, 3H)

Synthesis Example 5 Synthesis of Compound 8

Compound 8 (62%) was synthesized in the same manner as in SynthesisExample 1, except that in synthesizing Compound 3, Intermediate G wasused instead of Intermediate C. The obtained compound was identified byLC-MS and NMR.

C₅₀H₃₀N₄: M+ 686.25

1H NMR (CDCl₃, 300 MHz) δ (ppm) 8.30-8.13 (m, 8H), 7.89-7.75 (m, 7H),7.65-7.41 (m, 12H), 7.20 (m, 3H)

Synthesis Example 6 Synthesis of Compound 76

Synthesis of Intermediate 76-1

Intermediate 76-1 was prepared in the same manner as used insynthesizing Intermediate 3-1 of Synthesis Example 1, except thatIntermediate 76-2 and Intermediate 76-3 were respectively used insteadof Intermediate 3-2 and Intermediate B.

Synthesis of Compound 76

Compound 76 (yield of 74%) was prepared in the same manner as used insynthesizing Intermediate 3 of Synthesis Example 1, except that insynthesizing Compound 3, Intermediate 76-1 and Intermediate D wererespectively used instead of Intermediate 3-1 and Intermediate C. Theobtained compound was identified by LC-MS and NMR.

C₄₅H₂₇N₅: M+ 686.25

1H NMR (CDCl₃, 300 MHz) δ (ppm) 8.62 (d, 1H), 8.36 (m, 4H), 8.22-8.19(m, 4H), 7.74 (s, 1H), 7.65-7.50 (m, 14H), 7.20 (m, 3H)

Synthesis Example 7 Synthesis of Compound 60

Synthesis of Intermediate 60-2

Intermediate 60-2 was synthesized in the same manner as in synthesizingIntermediate 3-2 of Synthesis Example 1, except that Intermediate 60-3was used instead of Intermediate 3-3.

Synthesis of Intermediate 60-1

Intermediate 60-1 was prepared in the same manner as used insynthesizing Intermediate 3-1 of Synthesis Example 1, except thatIntermediate 60-2 and Intermediate H were respectively used instead ofIntermediate 3-2 and Intermediate B.

Synthesis of Compound 60

Compound 60 (yield of 51%) was prepared in the same manner as used insynthesizing Intermediate 3 of Synthesis Example 1, except thatIntermediate 60-1 and Intermediate I were respectively used instead ofIntermediate 3-1 and Intermediate C.

C₃₈H₂₂N₄: M+ 534.18

1H NMR (CDCl₃, 300 MHz) δ (ppm) 8.87 (d, 1H), 8.51-8.01 (m, 8H), 7.89(s, 1H), 7.70-7.43 (m, 8H), 7.20-7.15 (m, 4H)

Evaluation Example 1 Evaluation on HOMO, LUMO, and Triplets (T1) EnergyLevels

HOMO, LUMO and T1 energy levels of Compounds 2, 3, and 7 were evaluatedaccording to the method indicated in Table 2, and results thereof areshown in Table 3.

TABLE 2 HOMO energy level A potential (V)-current (A) graph of eachcompound was obtained by using cyclic evaluation method voltammetry (CV)(electrolyte: 0.1M Bu₄NClO₄/solvent: CH₂Cl₂/electrode: 3 electrodesystem (working electrode: GC, reference electrode: Ag/AgCl, auxiliaryelectrode: Pt)), and then, from reduction onset of the graph, a HOMOenergy level of the compound was calculated. LUMO energy level Eachcompound was diluted at a concentration of 1 × 10⁻⁵ M in CHCl₃, and anUV absorption evaluation method spectrum thereof was measured at roomtemperature by using a Shimadzu UV-350 spectrometer, and a LUMO energylevel thereof was calculated by using an optical band gap (Eg) from anedge of the absorption spectrum. T1 energy level A mixture (eachcompound was dissolved in an amount of 1 mg in 3 cc of toluene) ofevaluation method toluene and each compound was loaded into a quartzcell, and then, the resultant quartz cell was loaded into liquidnitrogen (77 K) and a photoluminescence spectrum thereof was measured byusing a device for measuring photoluminescence, and the obtainedspectrum was compared with a photoluminescence spectrum measured at roomtemperature, and peaks observed only at low temperature were analyzed tocalculate T1 energy levels.

TABLE 3 HOMO (eV) LUMO (eV) Compound No. (calc.) (calc.) T1 energy level(eV) 2 −5.515 −2.376 2.63 3 −5.303 −2.298 2.66 7 −5.587 −2.385 2.47

From Table 3, it is confirmed that the compounds above have electriccharacteristics that are suitable for use as a material for forming anorganic light-emitting device.

Evaluation Example 2 Thermal Characteristics Evaluation

Thermal analysis (N₂ atmosphere, temperature range: from roomtemperature to 800° C. (10° C./min)-TGA, from room temperature to 400°C.-DSC, Pan Type: Pt Pan in disposable Al Pan (TGA), and disposable Alpan (DSC)) was performed on Compounds 7 and 8 and Compounds C and D byusing thermo gravimetric analysis (TGA) and differential scanningcalorimetry (DSC), and results thereof are shown in Table 4. As shown inTable 4, it was confirmed that the synthesized compounds had excellentthermal stability.

TABLE 4 Compound No. Tg (° C.) Td (1%, ° C.) Td (5%, ° C.) Compound 7149.45 447.8 486.4 Compound 8 167.33 482.5 521.5 Compound C 128.8 427.3473.9 Compound D 144.2 462.5 502.1

Example 1

A glass substrate with ITO/Ag/ITO (70/1,000/70 Å) anode thereon was cutto a size of 50 mm×50 mm×0.5 mm, and then, ultrasonically cleaned withisopropyl alcohol, acetone, and pure water for 5 minutes each, and thenexposed to ultraviolet (UV) light for 30 minutes and then ozone. Then,the glass substrate was loaded into a vacuum deposition apparatus.

2-TNATA was deposited on the anode on the glass substrate to form a holeinjection layer having a thickness of 600 Å, and then NPB was depositedon the hole injection layer to form a hole transport layer having athickness of 1,000 Å to form a hole transport region.

Subsequently, Compound 3 (host) and Ir(ppy)₃ (dopant, referred to asCompound PD1 in this application) were co-deposited on the holetransport layer were co-deposited at a weight ratio of 91:9 to form anemission layer having a thickness of 250 Å.

BCP was deposited on the emission layer to form a hole blocking layerhaving a thickness of 50 Å, and Alq₃ was deposited on the hole blockinglayer to form an electron transport layer having a thickness of 350 Å,and LiF was deposited on the electron transport layer to form anelectron injection layer having a thickness of 10 Å to form an electrontransport region.

Mg and Ag were deposited on the electron injection layer at a weightratio of 90:10 to form a cathode having a thickness of 120 Å, therebycompleting the manufacture of an organic light-emitting device.

Example 2

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an emission layer, as a host,Compound 2 was used instead of Compound 3.

Example 3

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an emission layer, as a host,Compound 4 was used instead of Compound 3.

Example 4

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an emission layer, as a host,Compound 76 was used instead of Compound 3.

Example 5

An organic light-emitting device was manufactured in the same manner asin Example 1, except that a thickness of the hole transport layer was1,350 Å, and in forming an emission layer, Compound 7 was used as thehost, PtOEP was used as the dopant, and a thickness of the emissionlayer was 400 Å.

Example 6

An organic light-emitting device was manufactured in the same manner asin Example 4, except that in forming an emission layer, as a host,Compound 8 was used instead of Compound 7.

Comparative Example 1

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an emission layer, as a host,Compound A was used instead of Compound 3.

Comparative Example 2

An organic light-emitting device was manufactured in the same manner asin Example 1, except that in forming an emission layer, as a host,Compound B was used instead of Compound 3.

Comparative Example 3

An organic light-emitting device was manufactured in the same manner asin Example 5, except that in forming an emission layer, as a host,Compound A was used instead of Compound 7.

Comparative Example 3

An organic light-emitting device was manufactured in the same manner asin Example 5, except that in forming an emission layer, as a host,Compound B was used instead of Compound 7.

Evaluation Example 4 Evaluation on Characteristics of an OrganicLight-Emitting Device

Driving voltage, current density, brightness, luminescence color,efficiency, and LT₉₇ (@10 milliamperes per square centimeter, mA/cm²) ofthe organic light-emitting devices of Examples 1 to 6 and ComparativeExamples 1 to 4 were evaluated by using PR650 Spectroscan SourceMeasurement Unit. (a product of PhotoResearch Company). Results thereofare shown in Table 6 below.

TABLE 6 Driving Current EML Voltage Density Brightness EfficiencyEmission Host Dopant (V) (mA/cm²) (cd/m²) (cd/A) color LT₉₇ (hr) Example1 Compound 3 Ir(ppy)₃ 5.4 10 6,829 68.3 Green 75 Example 2 Compound 2Ir(ppy)₃ 5.3 10 6,724 67.2 Green 79 Example 3 Compound 4 Ir(ppy)₃ 5.9 106,709 67.1 Green 76 Example 4 Compound 76 Ir(ppy)₃ 5.6 10 6,171 61.7Green 70 Example 5 Compound 7 PtOEP 5.8 10 3,422 34.2 Red 110 Example 6Compound 8 PtOEP 6.0 10 3,117 31.2 Red 114 Comparative Compound AIr(ppy)₃ 8.2 10 4,564 45.6 Green 32 Example 1 Comparative Compound BIr(ppy)₃ 7.3 10 4,276 42.8 Green 35 Example 2 Comparative Compound APtOEP 7.9 10 1,810 18.1 Red 52 Example 3 Comparative Compound B PtOEP7.7 10 1,921 19.2 Red 50 Example 4

From Table 6, it was confirmed that the organic light-emitting devicesof Examples 1 to 4 had lower driving voltage, higher efficiency, andlonger lifespan of the organic light-emitting devices of ComparativeExamples 1 and 2, and the organic light-emitting devices of Examples 5and 6 had lower driving voltage, higher efficiency, and longer lifespanthan the organic light-emitting devices of Comparative Examples 3 and 4.

The condensed cyclic compounds according to embodiments have excellentelectric characteristics and thermal stability. Accordingly, organiclight-emitting devices including the condensed cyclic compounds may havea low driving voltage, high efficiency, high brightness, and a longlifespan.

It should be understood that the exemplary embodiments described hereinshould be considered in a descriptive sense only and not for purposes oflimitation. Descriptions of features or aspects within each embodimentshould typically be considered as available for other similar featuresor aspects in other embodiments.

What is claimed is:
 1. A condensed cyclic compound represented by one ofFormulae 1A to 1C:

wherein in the Formulae 1A to 1C and 2A to 2F, Ring A is selected from asubstituted or unsubstituted C₃-C₁₀ cycloalkyl group, a substituted orunsubstituted C₂-C₁₀ heterocycloalkyl group, a substituted orunsubstituted C₃-C₁₀ cycloalkenyl group, a substituted or unsubstitutedC₂-C₁₀ heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀aryl group, a substituted or unsubstituted C₂-C₆₀ heteroaryl group, asubstituted or unsubstituted monovalent non-aromatic condensedpolycyclic group, a substituted or unsubstituted monovalent non-aromaticcondensed heteropolycyclic group, a group represented by Formula 2A, anda group represented by Formula 2B; Ring B₁ is a C₅-C₂₀ carbocyclic groupor a C₂-C₂₀ heterocyclic group that does not comprise a nitrogen atom asa ring-forming atom; Ring B₂, Ring B₃, Ring C₁, and Ring C₂ are eachindependently a C₅-C₂₀ carbocyclic group, or a C₂-C₂₀ heterocyclicgroup, provided that at least one selected from Ring B₂ and Ring B₃ is aC₂-C₂₀ heterocyclic group comprising a nitrogen atom as a ring-formingatom, and at least one selected from Ring C₁ and Ring C₂ is a C₂-C₂₀heterocyclic group comprising a nitrogen atom as a ring-forming atom;Pc₁ and Pc₂ in Formula 1A and 1B are each independently a grouprepresented by Formulae 2A or a group represented by Formula 2B; Cz₁,Cz₂, and Cz₃ in Formula 1C are each independently selected from a grouprepresented by Formula 2C, a group represented by Formula 2D, a grouprepresented by Formula 2E, and a group represented by Formula 2F; c1,c2, c11, c12, c13, p1, p2, p11, p12, and p13 are each independently aninteger selected from 0 to 3; when c1 and c2 in Formula 1A and 1B bothare 0, Ring A is a group represented by Formula 2A or a grouprepresented by Formula 2B; when Ring A in Formula 1A and 1B is neither agroup represented by Formula 2A nor a group represented by Formula 2B;c1+c2≠0; at least one selected from Ring A in Formula 1A, all R₁ inFormula 1A, and all R₂ in Formula 1A is a substituted or unsubstitutedC₂-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₂-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₂-C₆₀heteroaryl group, or a substituted or unsubstituted monovalentnon-aromatic condensed hetero-polycyclic group, each comprising at leastone Moiety 1 as a ring-forming moiety; the sum of c11, c12, and c13 inFormula 1C is not 0; when each of Cz₁, Cz₂, and Cz₃ in Formula 1C isindependently a group represented by Formula 2C or a group representedby Formula 2D, at least one selected from all R₁₁ in Formula 1C, all R₁₂in Formula 1C, and all R₁₃ in Formula 1C is a substituted orunsubstituted C₂-C₁₀ heterocycloalkyl group, a substituted orunsubstituted C₂-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₂-C₆₀ heteroaryl group, or a substituted or unsubstitutedmonovalent non-aromatic condensed hetero-polycyclic group, eachcomprising at least one Moiety 1 as a ring-forming moiety; L₁ to L₃, L₁₁to L₁₃, L₂₁ to L₂₄, and L₃₁ to L₃₃ are each independently selected froma substituted or unsubstituted C₁-C₆₀ alkylene group, a substituted orunsubstituted C₂-C₆₀ alkenylene group, a substituted or unsubstitutedC₃-C₁₀ cycloalkylene group, a substituted or unsubstituted C₂-C₁₀heterocycloalkylene group, a substituted or unsubstituted C₃-C₁₀cycloalkenylene group, a substituted or unsubstituted C₂-C₁₀heterocycloalkenylene group, a substituted or unsubstituted C₆-C₆₀arylene group, a substituted or unsubstituted C₂-C₆₀ heteroarylenegroup, a substituted or unsubstituted divalent non-aromatic condensedpolycyclic group, and a substituted or unsubstituted divalentnon-aromatic condensed hetero-polycyclic group; a1 to a3, a11 to a13,a21 to a24, and a31 to a33 are each independently an integer selectedfrom 0 to 6; R₁, R₂, R₁₁ to R₁₃, R₂₁ to R₂₃, and R₃₁ to R₃₃ are eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a substituted or unsubstituted C₁-C₆₀ alkyl group, asubstituted or unsubstituted C₂-C₆₀ alkenyl group, a substituted orunsubstituted C₂-C₆₀ alkynyl group, a substituted or unsubstitutedC₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkylgroup, a substituted or unsubstituted C₂-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₂-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, asubstituted or unsubstituted C₂-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedhetero-polycyclic group, —N(Q₁)(Q₂), —Si(Q₃)(Q₄)(Q₅), and —B(Q₆)(Q₇);b1, b2, b11 to b13, b21 to b23, and b31 to b33 are each independently aninteger selected from 0 to 4; at least one of substituents of thesubstituted C₁-C₆₀ alkylene group, substituted C₂-C₆₀ alkenylene group,substituted C₃-C₁₀ cycloalkylene group, substituted C₂-C₁₀heterocycloalkylene group, substituted C₃-C₁₀ cycloalkenylene group,substituted C₂-C₁₀ heterocycloalkenylene group, substituted C₆-C₆₀arylene group, substituted C₂-C₆₀ heteroarylene group, substituteddivalent non-aromatic condensed polycyclic group, substituted divalentnon-aromatic condensed hetero-polycyclic group, substituted C₁-C₆₀ alkylgroup, substituted C₂-C₆₀ alkenyl group, substituted C₂-C₆₀ alkynylgroup, substituted C₁-C₆₀ alkoxy group, substituted C₃-C₁₀ cycloalkylgroup, substituted C₂-C₁₀ heterocycloalkyl group, substituted C₃-C₁₀cycloalkenyl group, substituted C₂-C₁₀ heterocycloalkenyl group,substituted C₆-C₆₀ aryl group, substituted C₆-C₆₀ aryloxy group,substituted C₆-C₆₀ arylthio group, substituted C₂-C₆₀ heteroaryl group,a substituted monovalent non-aromatic condensed polycyclic group, and asubstituted monovalent non-aromatic condensed hetero-polycyclic group isselected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid group or a salt thereof, asulfonic acid group or a salt thereof, a phosphoric acid group or a saltthereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynylgroup, and a C₁-C₆₀ alkoxy group; a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenylgroup, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkylgroup, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, aC₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, aC₂-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclicgroup, a monovalent non-aromatic condensed hetero-polycyclic group,—N(Q₁₁)(Q₁₂), —Si(Q₁₃)(Q₁₄)(Q₁₅), and —B(Q₁₆)(Q₁₇); a C₃-C₁₀ cycloalkylgroup, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, aC₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxygroup, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, and a monovalent non-aromaticcondensed hetero-polycyclic group; a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, and a monovalent non-aromaticcondensed heteropolycyclic group, each substituted with at least oneselected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, aC₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —N(Q₂₁)(Q₂₂), —Si(Q₂₃)(Q₂₄)(Q₂₅), and—B(Q₂₆)(Q₂₇); and —N(Q₃₁)(Q₃₂), —Si(Q₃₃)(Q₃₄)(Q₃₅), and —B(Q₃₆)(Q₃₇);wherein Q₁ to Q₇, Q₁₁ to Q₁₇, Q₂₁ to Q₂₇, and Q₃₁ to Q₃₇ are eachindependently selected from a hydrogen, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic hetero-condensed polycyclic group:**═N—***  Moiety 1 wherein in Moiety 1, ** and *** each indicates abinding site to a ring-forming atom included in a ring comprisingMoiety
 1. 2. The condensed cyclic compound of claim 1, wherein Ring A inFormula 1A is selected from a phenyl group, a naphthyl group, aphenalenyl group, a phenanthrenyl group, an anthracenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolylgroup, an imidazolyl group, a pyrazolyl group, a thiazolyl group, anisothiazolyl group, an oxazolyl group, an isooxazolyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, anisoindolyl group, an indolyl group, an indazolyl group, a purinyl group,a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, aphthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, aquinazolinyl group, a cinnolinyl group, phenanthridinyl,phenanthrolinyl, phenazinyl, a benzoimidazolyl group, anisobenzothiazolyl group, a benzooxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, an imidazopyridinyl group, an imidazopyrimidinyl group,a benzofuropyrazinyl group, a benzofuropyrimidinyl group, abenzofuropyridinyl group, a benzothienopyrazinyl group, abenzothienopyrimidinyl group, a benzothienopyridinyl group, a grouprepresented by Formula 2A, and a group represented by Formula 2B; and aphenyl group, a naphthyl group, a phenalenyl group, a phenanthrenylgroup, an anthracenyl group, a triphenylenyl group, a pyrenyl group, achrysenyl group, a pyrrolyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisooxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinylgroup, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group,phenanthridinyl, phenanthrolinyl, phenazinyl, a benzoimidazolyl group,an isobenzothiazolyl group, a benzooxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, an imidazopyridinyl group, an imidazopyrimidinyl group,a benzofuropyrazinyl group, a benzofuropyrimidinyl group, abenzofuropyridinyl group, a benzothienopyrazinyl group, abenzothienopyrimidinyl group, and a benzothienopyridinyl group, eachsubstituted with one selected from a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, aphenyl group substituted with a C₁-C₂₀ alkyl group, a naphthyl group, aphenalenyl group, a phenanthrenyl group, an anthracenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, abiphenyl group, and —Si(Q₃₃)(Q₃₄)(Q₃₅), wherein Q₃₃ to Q₃₅ are eachindependently selected from a hydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a naphthyl group, an anthracenyl group, atriphenylenyl group, a pyrenyl group, a phenanthrenyl group, a fluorenylgroup, a chrysenyl group, a carbazolyl group, a benzocarbazolyl group, adibenzocarbazolyl group, a dibenzofuranyl group, a dibenzothiophenylgroup, a pyridinyl group, a pyrimidinyl group, a triazinyl group, aquinolinyl group, an isoquinolinyl group, a quinazolinyl group, and aquinoxalinyl group.
 3. The condensed cyclic compound of claim 1, whereinRing A in Formula 1A is represented by one selected from Formulae 4-1 to4-51, Formulae 6-1 to 6-5, a group represented Formula 2A, and a grouprepresented by Formula 2B:

wherein in Formulae 4-1 to 4-51 and 6-1 to 6-5: Y₃₁ is O, S,C(Z₃₃)(Z₃₄), N(Z₃₅), or Si(Z₃₆)(Z₃₇); Z₃₁ to Z₃₇ are each independentlyselected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group substitutedwith a C₁-C₂₀ alkyl group, a phenyl group, a phenyl group, a naphthylgroup, an anthracenyl group, a triphenylenyl group, a pyrenyl group, aphenanthrenyl group, a fluorenyl group, a chrysenyl group, a carbazolylgroup, a benzocarbazolyl group, a dibenzocarbazolyl group, adibenzofuranyl group, a dibenzothiophenyl group, a pyridinyl group, apyrimidinyl group, a triazinyl group, a quinolinyl group, anisoquinolinyl group, a quinazolinyl group, a quinoxalinyl group, abiphenyl group, and —Si(Q₃₃)(Q₃₄)(Q₃₅), wherein Q₃₃ to Q₃₅ are eachindependently selected from a hydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a naphthyl group, an anthracenyl group, atriphenylenyl group, a pyrenyl group, a phenanthrenyl group, a fluorenylgroup, a chrysenyl group, a carbazolyl group, a benzocarbazolyl group, adibenzocarbazolyl group, a dibenzofuranyl group, a dibenzothiophenylgroup, a pyridinyl group, a pyrimidinyl group, a triazinyl group, aquinolinyl group, an isoquinolinyl group, a quinazolinyl group, and aquinoxalinyl group; e1 is an integer of 1 to 5; e2 is an integer of 1 to7; e3 is an integer of 1 to 3; e4 is an integer of 1 to 4; e5 is aninteger of 1 or 2; e6 is an integer of 1 to 6; and * indicates a bindingsite to a neighboring atom.
 4. The condensed cyclic compound of claim 1,wherein Ring B₁ is a benzene, a naphthalene, an anthracene, aphenanthrene, a benzofuran, or a benzothiophene.
 5. The condensed cycliccompound of claim 1, wherein Ring B₂, Ring B₃, Ring C₁, and Ring C₂ areeach independently a benzene, a naphthalene, an anthracene, aphenanthrene, a benzofuran, a benzothiophene, a pyridine, a pyrimidine,a pyrazine, a benzofuropyrazine, a benzofuropyrimidine,benzofuropyridine, a benzothienopyrazine, a benzothienopyrimidine, or abenzothienopyridine; at least one selected from Ring B₂ and Ring B₃ is apyridine, a pyrimidine, a pyrazine, a benzofuropyrazine, abenzofuropyrimidine, a benzofuropyridine, a benzothienopyrazine, abenzothienopyrimidine, or a benzothienopyridine; and at least oneselected from Ring C₁ and Ring C₂ is a pyridine, a pyrimidine, apyrazine, a benzofuropyrazine, a benzofuropyrimidine, abenzofuropyridine, a benzothienopyrazine, a benzothienopyrimidine, or abenzothienopyridine.
 6. The condensed cyclic compound of claim 1,wherein c1=0, c2=0, and Ring A is a group represented by Formula 2A or agroup represented by Formula 2B; c1=1 and c2=0; c1=1, and c2=1; c11=1,c12=0, and c13=0; c11=0, c12=0, and c13=1; c11=1, c12=1, and c13=0; orc11=1, c12=0, and c13=1.
 7. The condensed cyclic compound of claim 1,wherein L₁ to L₃, L₁₁ to L₁₃, L₂₁ to L₂₄, and L₃₁ to L₃₃ are eachindependently selected from a phenylene group, a pentalenylene group, anindenylene group, a naphthylene group, an azulenylene group, aheptalenylene group, an indacenylene group, an acenaphthylene group, afluorenylene group, a spiro-fluorenylene group, a phenalenylene group, aphenanthrenylene group, an anthracenylene group, a fluoranthrenylenegroup, a triphenylenylene group, a pyrenylene group, a chrysenylenegroup, a naphthacenylene group, a picenylene group, a perylenylenegroup, a pentaphenylene group, a hexacenylene group, a pyrrolylenegroup, an imidazolylene group, a pyrazolylene group, a pyridinylenegroup, a pyrazinylene group, a pyrimidinylene group, a pyridazinylenegroup, an isoindolylene group, an indolylene group, an indazolylenegroup, a purinylene group, a quinolinylene group, an isoquinolinylenegroup, a benzoquinolinylene group, a phthalazinylene group, anaphthyridinylene group, a quinoxalinylene group, a quinazolinylenegroup, a cinnolinylene group, a carbazolylene group, aphenanthridinylene group, an acridinylene group, a phenanthrolinylenegroup, a phenazinylene group, a benzoxazolylene group, abenzoimidazolylene group, a furanylene group, a benzofuranylene group, athiophenylene group, a benzothiophenylene group, a thiazolylene group,an isothiazolylene group, a benzothiazolylene group, an isoxazolylenegroup, an oxazolylene group, a triazolylene group, a tetrazolylenegroup, an oxadiazolylene group, a triazinylene group, adibenzofuranylene group, a dibenzothiophenylene group, abenzocarbazolylene group, a dibenzocarbazolylene group, animidazopyrimidinylene group, and an imidazopyridinylene group; and aphenylene group, a pentalenylene group, an indenylene group, naphthylenegroup, an azulenylene group, a heptalenylene group, an indacenylenegroup, an acenaphthylene group, a fluorenylene group, aspiro-fluorenylene group, a phenalenylene group, a phenanthrenylenegroup, an anthracenylene group, a fluoranthrenylene group, atriphenylenylene group, a pyrenylene group, a chrysenylene group, anaphthacenylene group, a picenylene group, a perylenylene group, apentaphenylene group, a hexacenylene group, a pyrrolylene group, animidazolylene group, a pyrazolylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a pyridazinylene group, anisoindolylene group, an indolylene group, an indazolylene group, apurinylene group, a quinolinylene group, an isoquinolinylene group, abenzoquinolinylene group, a phthalazinylene group, a naphthyridinylenegroup, a quinoxalinylene group, a quinazolinylene group, a cinnolinylenegroup, a carbazolylene group, a phenanthridinylene group, anacridinylene group, a phenanthrolinylene group, a phenazinylene group, abenzooxazolylene group, a benzoimidazolylene group, a furanylene group,a benzofuranylene group, a thiophenylene group, a benzothiophenylenegroup, a thiazolylene group, an isothiazolylene group, abenzothiazolylene group, an isoxazolylene group, an oxazolylene group, atriazolylene group, a tetrazolylene group, an oxadiazolylene group, atriazinylene group, a dibenzofuranylene group, a dibenzothiophenylenegroup, a benzocarbazolylene group, a dibenzocarbazolylene group animidazopyrimidinylene group, or an imidazopyridinylene group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a C₆-C₂₀aryl group, a C₂-C₂₀ heteroaryl group, a monovalent non-aromaticcondensed polycyclic group, a monovalent non-aromatic condensedhetero-polycyclic group, and —Si(Q₃₃)(Q₃₄)(Q₃₅), wherein Q₃₃ to Q₃₅ areeach independently selected from a hydrogen, a C₁-C₂₀ alkyl group, aC₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, an anthracenylgroup, a pyrenyl group, a phenanthrenyl group, a fluorenyl group, acarbazolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, apyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinylgroup, a triazinyl group, a quinolinyl group, an isoquinolinyl group aphthalazinyl group, a quinoxalinyl group, a cinnolinyl group, and aquinazolinyl group.
 8. The condensed cyclic compound of claim 1, whereinL₁ to L₃, L₁₁ to L₁₃, L₂₁ to L₂₄, and L₃₁ to L₃₃ are each independentlyrepresented by one of Formulae 2-1 to 2-37:

wherein in Formulae 2-1 to 2-37, Y₁ may be O, S, S(═O), S(═O)₂,C(Z₃)(Z₄), N(Z₅), or Si(Z₆)(Z₇); Z₁ to Z₇ are each independentlyselected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, an anthracenyl group, a triphenylenyl group, a pyrenyl group, aphenanthrenyl group, a fluorenyl group, a chrysenyl group, a carbazolylgroup, a benzocarbazolyl group, a dibenzocarbazolyl group, adibenzofuranyl group, a dibenzothiophenyl group, a pyridinyl group, apyrimidinyl group, a triazinyl group, a quinolinyl group, anisoquinolinyl group, a quinazolinyl group, a quinoxalinyl group, abiphenyl group, and —Si(Q₃₃)(Q₃₄)(Q₃₅), wherein Q₃₃ to Q₃₅ are eachindependently selected from a hydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a naphthyl group, an anthracenyl group, apyrenyl group, a phenanthrenyl group, a fluorenyl group, a carbazolylgroup, a benzocarbazolyl group, a dibenzocarbazolyl group, a pyridinylgroup, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, atriazinyl group, a quinolinyl group, an isoquinolinyl group aphthalazinyl group, a quinoxalinyl group, a cinnolinyl group, and aquinazolinyl group; d1 is an integer of 1 to 4; d2 is an integer of 1 to3; d3 is an integer of 1 to 6; d4 is an integer of 1 to 8; d5 is aninteger of 1 or 2; d6 is an integer of 1 to 5; and * indicates a bindingsite to a neighboring atom.
 9. The condensed cyclic compound of claim 1,wherein L₁ to L₃, L₁₁ to L₁₃, L₂₁ to L₂₄, and L₃₁ to L₃₃ are eachindependently selected from a phenylene group, a naphthylene group, aphenanthrenylene group, an anthracenylene group, a triphenylenylenegroup, and a carbazolylene group; and a phenylene group, naphthylenegroup, a phenanthrenylene group, an anthracenylene group, atriphenylenylene group, and a carbazolylene group each substituted withat least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid or a salt thereof,a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a naphthylgroup, an anthracenyl group, a triphenylenyl group, a phenanthrenylgroup, and a biphenyl group.
 10. The condensed cyclic compound of claim1, wherein L₁ to L₃, L₁₁ to L₁₃, L₂₁ to L₂₄, and L₃₁ to L₃₃ are eachindependently represented by one of Formulae 3-1 to 3-33:

wherein * and *′ in Formulae 3-1 to 3-33 each independently indicates abinding site to a neighboring atom.
 11. The condensed cyclic compound ofclaim 1, wherein a1 to a3, a11 to a13, a21 to a24, and a31 to a33 areeach independently 0, 1, or
 2. 12. The condensed cyclic compound ofclaim 1, wherein R₁, R₂, R₁₁ to R₁₃, R₂₁ to R₂₃, and R₃₁ to R₃₃ are eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group; a C₁-C₂₀ alkylgroup and a C₁-C₂₀ alkoxy group, each substituted with at least oneselected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, and a phosphoric acid or a saltthereof; a phenyl group, a pentalenyl group, an indenyl group, anaphthyl group, an azulenyl group, a heptalenyl group, an indacenylgroup, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group,a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, aphenanthrenyl group, an anthracenyl group, a fluoranthenyl group, atriphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenylgroup, a picenyl group, a perylenyl group, a pentaphenyl group, ahexacenyl group, a pentacenyl group, a rubicenyl group, a coronenylgroup, an ovalenyl group, a pyrrolyl group, a thiophenyl group, afuranyl group, an imidazolyl group, a pyrazolyl group, a thiazolylgroup, an isothiazolyl group, an oxazolyl group, an isooxazolyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, an isoindolyl group, an indolyl group, an indazolyl group, apurinyl group, a quinolinyl group, an isoquinolinyl group, abenzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, aquinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthridinyl group, an acridinyl group, aphenanthrolinyl group, a phenazinyl group, a benzoimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, an imidazopyridinyl group, and animidazopyrimidinyl group; a phenyl group, a pentalenyl group, an indenylgroup, a naphthyl group, an azulenyl group, a heptalenyl group, anindacenyl group, an acenaphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenalenyl group, a phenanthrenyl group, an anthracenyl group, afluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenylgroup, a naphthacenyl group, a picenyl group, a perylenyl group, apentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenylgroup, a coronenyl group, an ovalenyl group, a pyrrolyl group, athiophenyl group, a furanyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisooxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinylgroup, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, phenanthridinyl, acridinyl, phenanthrolinyl,phenazinyl, a benzoimidazolyl group, a benzofuranyl group, abenzothiophenyl group, an isobenzothiazolyl group, a benzooxazolylgroup, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group,an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, adibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolylgroup, an imidazopyridinyl group, and an imidazopyrimidinyl group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenylgroup, a phenyl group substituted with a C₁-C₂₀ alkyl group, apentalenyl group, an indenyl group, a naphthyl group, an azulenyl group,a heptalenyl group, an indacenyl group, an acenaphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isooxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzoimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzooxazolyl group, an isobenzoxazolylgroup, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, atriazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, an imidazopyridinylgroup, an imidazopyrimidinyl group, a biphenyl group, and—Si(Q₃₃)(Q₃₄)(Q₃₅); and —Si(Q₃)(Q₄)(Q₅), wherein Q₃ to Q₅ and Q₃₃ to Q₃₅are each independently selected from a hydrogen, a C₁-C₂₀ alkyl group, aC₁-C₂₀ alkoxy group, a phenyl group, a naphthyl group, an anthracenylgroup, a pyrenyl group, a phenanthrenyl group, a fluorenyl group, achrysenyl group, a carbazolyl group, a benzocarbazolyl group, adibenzocarbazolyl group, a dibenzofuranyl group, a dibenzothiophenylgroup, a pyridinyl group, a pyrimidinyl group, a triazinyl group, aquinolinyl group, an isoquinolinyl group, a quinazolinyl group, and aquinoxalinyl group.
 13. The condensed cyclic compound of claim 1,wherein R₁, R₂, R₁₁ to R₁₃, R₂₁ to R₂₃, and R₃₁ to R₃₃ are eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group; a C₁-C₂₀ alkylgroup and a C₁-C₂₀ alkoxy group, each substituted with at least oneselected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, and a phosphoric acid or a saltthereof; one of Formulae 4-1 to 4-51, 5-1 to 5-6, and 6-1 to 6-5; and—Si(Q₃)(Q₄)(Q₅), wherein Q₃ to Q₅ are each independently selected from ahydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, anaphthyl group, an anthracenyl group, a pyrenyl group, a phenanthrenylgroup, a fluorenyl group, a chrysenyl group, a carbazolyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a dibenzofuranylgroup, a dibenzothiophenyl group, a pyridinyl group, a pyrimidinylgroup, a triazinyl group, a quinolinyl group, an isoquinolinyl group, aquinazolinyl group, and a quinoxalinyl group:

wherein in Formulae 4-1 to 4-51, 5-1 to 5-6, and 6-1 to 6-5, Y₃₁ is O,S, C(Z₃₃)(Z₃₄), N(Z₃₅), or Si(Z₃₆)(Z₃₇); Z₃₁ to Z₃₇ are eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl groupsubstituted with a C₁-C₂₀ alkyl group, a phenyl group, a phenyl group, anaphthyl group, an anthracenyl group, a triphenylenyl group, a pyrenylgroup, a phenanthrenyl group, a fluorenyl group, a chrysenyl group, acarbazolyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, adibenzofuranyl group, a dibenzothiophenyl group, a pyridinyl group, apyrimidinyl group, a triazinyl group, a quinolinyl group, anisoquinolinyl group, a quinazolinyl group, a quinoxalinyl group, abiphenyl group, and —Si(Q₃₃)(Q₃₄)(Q₃₅), wherein Q₃₃ to Q₃₅ are eachindependently selected from a hydrogen, a C₁-C₂₀ alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a naphthyl group, an anthracenyl group, atriphenylenyl group, a pyrenyl group, a phenanthrenyl group, a fluorenylgroup, a chrysenyl group, a carbazolyl group, a benzocarbazolyl group, adibenzocarbazolyl group, a dibenzofuranyl group, a dibenzothiophenylgroup, a pyridinyl group, a pyrimidinyl group, a triazinyl group, aquinolinyl group, an isoquinolinyl group, a quinazolinyl group, and aquinoxalinyl group; e1 is an integer of 1 to 5; e2 is an integer of 1 to7; e3 is an integer of 1 to 3; e4 is an integer of 1 to 4; e5 is aninteger of 1 or 2; e6 is an integer of 1 to 6; and * indicates a bindingsite to a neighboring atom.
 14. The condensed cyclic compound of claim1, wherein Formula 2A is represented by one of Formulae 2A(1) to 2A(5),Formula 2B is represented by one of Formulae 2B(1) and 2B(2), Formula 2Dis represented by one of Formulae 2D(1) to 2D(5), and Formula 2F isrepresented by one of Formulae 2F(1) and 2F(2):

wherein L₂₁ to L₂₄, a21 to a24, R₂₁ to R₂₃, b21 to b23, L₃₁ to L₃₃, a31to a33, R₃₁ to R₃₃, b31 to b33, c21 to c23, c31, and c32 in Formulae 2A(1) to 2A (5), 2B(1), 2B(2), 2E(1) to 2E(5), 2F(1), and 2F(2) are thesame as recited in claim
 1. 15. The condensed cyclic compound of claim1, wherein the condensed cyclic compound is represented by one ofFormulae 1A(1) to 1A(8):

wherein, in Formulae 1A(1) and 1A(8), Ring A is a substituted orunsubstituted C₂-C₁₀ heterocycloalkyl group, a substituted orunsubstituted C₂-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₂-C₆₀ heteroaryl group, or a substituted or unsubstitutedmonovalent non-aromatic condensed hetero-polycyclic group, eachcomprising Moiety 1 as a ring-forming moiety; Pc₁, Pc₂, L₃, a3, R₁, R₂,p1, and p2 are the same as recited in claim 1; and R₃ and R₄ are thesame as recited in claim
 1. 16. The condensed cyclic compound of claim1, wherein the condensed cyclic compound is represented by one selectedfrom Formulae 1B(1) to 1B(10):

wherein Ring A, Pc₂, Pc₂, L₃, a3, R₁, R₂, p1, and p2 in Formulae 1B(1)to 1B(10) are the same as recited in claim
 1. 17. The condensed cycliccompound of claim 1, wherein the condensed cyclic compound isrepresented by Formulae 1C(1) or 1C(2):

wherein Cz₁, Cz₂, Cz₃, R₁₁, R₁₂, R₁₃, p11, p12, and p13 in Formulae1C(1) and 1C(2) are the same as recited in claim
 1. 18. The condensedcyclic compound of claim 1, wherein the condensed cyclic compound isrepresented by Formula 1C(3):

wherein in Formula 1C(3), Cz₃, L₁₁, and a11 are the same as recited inclaim 1; R₁₁ is a substituted or unsubstituted C₂-C₁₀ heterocycloalkylgroup, a substituted or unsubstituted C₂-C₁₀ heterocycloalkenyl group, asubstituted or unsubstituted C₂-C₆₀ heteroaryl group, or a substitutedor unsubstituted monovalent non-aromatic condensed hetero-polycyclicgroup, each comprising Moiety 1 as a ring-forming moiety; and b11 is 1or
 2. 19. The condensed cyclic compound of claim 1, wherein thecondensed cyclic compound represented by Formulae 1C(4) or 1C(5):

wherein in Formulae 1C (4) and 1C (5),Cz₁ and Cz₃ are each a grouprepresented by Formula 2E or a group represented by Formula 2F.
 20. Thecondensed cyclic compound of claim 1, wherein the condensed cycliccompound is one of Compounds 1 to 76:


21. An organic light-emitting device comprising: a first electrode; asecond electrode; and an organic layer disposed between the firstelectrode and the second electrode, wherein the organic layer comprisesan emission layer and at least one condensed cyclic compound representedby Formula 1 of claim
 1. 22. The organic light-emitting device of claim21, wherein the emission layer comprises the condensed cyclic compoundrepresented by Formula 1 of claim
 1. 23. The organic light-emittingdevice of claim 21, wherein the emission layer comprises a first hostand a second host, the condensed cyclic compound represented by one ofFormulae 1A to 1C exists in the emission layer, the first host comprisesthe condensed cyclic compound represented by one of Formulae 1A to 1C,and the second host comprises at least one selected from a firstcompound represented by Formula 41 and a second compound represented byFormula 61:

wherein in the formulae 41, 61, 61A, and 61B, X₄₁ isN-[(L₄₂)_(a42)-(R₄₂)_(b42)], S, O, S(═O), S(═O)₂, C(═O), C(R₄₃)(R₄₄),Si(R₄₃)(R₄₄), P(R₄₃), P(═O)(R₄₃), or C═N(R₄₃); Ring A₆₁ in Formula 61 isrepresented by Formula 61A; Ring A₆₂ in Formula 61 is represented byFormula 61B; X₆₁ is N-[(L₆₂)_(a62)-(R₆₂)_(b62)], S, O, S(═O), S(═O)₂,C(═O), C(R₆₃)(R₆₄), Si(R₆₃)(R₆₄), P(R₆₃), P(═O)(R₆₃), or C═N(R₆₃); X₇₁is C(R₇₁) or N; X₇₂ is C(R₇₂) or N; X₇₃ is C(R₇₃) or N; X₇₄ is C(R₇₄) orN; X₇₅ is C(R₇₅) or N; X₇₆ is C(R₇₆) or N; X₇₇ is C(R₇₇) or N; X₇₈ isC(R₇₈) or N; Ar₄₁, L₄₁, L₄₂, L₆₁, and L₆₂ are each independentlyselected from a substituted or unsubstituted C₃-C₁₀ cycloalkylene group,a substituted or unsubstituted C₂-C₁₀ heterocycloalkylene group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenylene group, a substitutedor unsubstituted C₂-C₁₀ heterocycloalkenylene group, a substituted orunsubstituted C₆-C₆₀ arylene group, a substituted or unsubstitutedC₂-C₆₀ heteroarylene group, a substituted or unsubstituted divalentnon-aromatic condensed polycyclic group, or a substituted andunsubstituted divalent non-aromatic condensed hetero-polycyclic group;n1 and n2 are each independently an integer selected from 0 to 3; a41,a42, a61, and a62 are each independently an integer selected from 0 to3; R₄₁ to R₄₃, R₅₁ to R₅₄, R₆₁ to R₆₄, and R₇₁ to R₇₉ are eachindependently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, ahydroxyl group, a cyano group, a nitro group, an amino group, an amidinogroup, a hydrazine group, a hydrazone group, a carboxylic acid or a saltthereof, a sulfonic acid or a salt thereof, a phosphoric acid or a saltthereof, a substituted or unsubstituted C₁-C₆₀ alkyl group, asubstituted or unsubstituted C₂-C₆₀ alkenyl group, a substituted orunsubstituted C₂-C₆₀ alkynyl group, a substituted or unsubstitutedC₁-C₆₀ alkoxy group, a substituted or unsubstituted C₃-C₁₀ cycloalkylgroup, a substituted or unsubstituted C₂-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₂-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, asubstituted or unsubstituted C₂-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, asubstituted or unsubstituted monovalent non-aromatic condensedhetero-polycyclic group, —N(Q₁)(Q₂), —Si(Q₃)(Q₄)(Q₅), and —B(Q₆)(Q₇);b41, b42, b51 to b54, b61, b62, and b79 are each independently aninteger selected from 1 to 3; at least one of substituents of thesubstituted C₁-C₆₀ alkylene group, substituted C₂-C₆₀ alkenylene group,substituted C₃-C₁₀ cycloalkylene group, substituted C₂-C₁₀heterocycloalkylene group, substituted C₃-C₁₀ cycloalkenylene group,substituted C₂-C₁₀ heterocycloalkenylene group, substituted C₆-C₆₀arylene group, substituted C₂-C₆₀ heteroarylene group, substituteddivalent non-aromatic condensed polycyclic group, substituted divalentnon-aromatic condensed hetero-polycyclic group, substituted C₁-C₆₀ alkylgroup, substituted C₂-C₆₀ alkenyl group, substituted C₂-C₆₀ alkynylgroup, substituted C₁-C₆₀ alkoxy group, substituted C₃-C₁₀ cycloalkylgroup, substituted C₂-C₁₀ heterocycloalkyl group, substituted C₃-C₁₀cycloalkenyl group, substituted C₂-C₁₀ heterocycloalkenyl group,substituted C₆-C₆₀ aryl group, substituted C₆-C₆₀ aryloxy group,substituted C₆-C₆₀ arylthio group, substituted C₂-C₆₀ heteroaryl group,a substituted monovalent non-aromatic condensed polycyclic group, and asubstituted monovalent non-aromatic condensed hetero-polycyclic group isselected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid group or a salt thereof, asulfonic acid group or a salt thereof, a phosphoric acid group or a saltthereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynylgroup, and a C₁-C₆₀ alkoxy group; a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenylgroup, a C₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group, eachsubstituted with at least one selected from a deuterium, —F, —Cl, —Br,—I, a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidor a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acidor a salt thereof, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkylgroup, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, aC₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, aC₂-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclicgroup, a monovalent non-aromatic condensed hetero-polycyclic group,—N(Q₁₁)(Q₁₂), —Si(Q₁₃)(Q₁₄)(Q₁₅), and —B(Q₁₆)(Q₁₇); a C₃-C₁₀ cycloalkylgroup, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, aC₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxygroup, a C₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, and a monovalent non-aromaticcondensed hetero-polycyclic group; a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, and a monovalent non-aromaticcondensed heteropolycyclic group, each substituted with at least oneselected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid or a salt thereof, asulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, aC₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, aC₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —N(Q₂₁)(Q₂₂), —Si(Q₂₃)(Q₂₄)(Q₂₅), and—B(Q₂₆)(Q₂₇); and —N(Q₃₁)(Q₃₂), —Si(Q₃₃)(Q₃₄)(Q₃₅), and —B(Q₃₆)(Q₃₇);wherein Q₁ to Q₇, Q₁₁ to Q₁₇, Q₂₁ to Q₂₇, and Q₃₁ to Q₃₇ are eachindependently selected from a hydrogen, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₂-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic hetero-condensed polycyclic group.
 24. Theorganic light-emitting device of claim 21, wherein the emission layerfurther comprises a phosphorescent dopant.
 25. The organiclight-emitting device of claim 21, wherein the electron transport regioncomprises at least one of the condensed cyclic compounds represented byFormula 1.